Activision has released Call of Duty for the iPhone... but don't get too excited, it's not exactly what you think. The first-person shooter hasn't quite been ported yet. Instead, they've released a "Call of Duty: World at War companion," which instead lets you track the activity on the popular World War II shooter game. You can track all of your ingame stats, and even follow your friends in the game and what they've done with their characters as well. And the app also comes with a news browser, to keep you up to date on the latest map releases and updates with the game. It's completely free, though you of course need a Call of Duty: World of War game for Xbox 360 or Playstation to actually get anything out of it.

In that sense, this app isn't quite so notable for what it is (World at War wasn't nearly as popular as Call of Duty 4, and this app is specifically about Treyarch's game), as what it portends: with Blizzard releasing their Armory app and a few other game companies releasing "companion" apps like this, we could be in for a very interesting holiday videogame season this year. Ports or translations of games don't do much to sell copies of the real games (as they tend to be either too similar or too different to the parent games), but "companions" like this can represent added functionality, and thus can do a lot to help and promote games on other platforms (imagine a Halo ODST app that sent you a push notification when your friend was playing or got a higher XP score than you did). This is far from the last we'll see of "companion" apps like this.

As I am finally wrapping my head around just how useful Gus Mueller's VoodooPad can actually be, I'm getting more interested in tinkering with how it can be extended and made to do my bidding. Dubbed as a "garden for your thoughts," VodooPad is a great place to jot down ideas, lists and notes with a wiki-like document format that makes it dead-simple to link one page to another. Out of the box VoodooPad comes with a lot of great features, but Gus also maintains a VoodooPad plug-ins page with a number of add-ons for making VoodooPad do everything from adding some handy keyboard shortcuts to more complex abilities like rendering math in your documents and allowing plug-in authors to use Python for writing VoodooPad plug-ins.

At the top of my list, however, is the HTML Tools plug-in which allows you to preview the current VoodooPad page as rendered HTML, Textile or Markdown, as well as copy the text you've written as HTML (with styling attributes and all) or Simple HTML with just the plain markup. It's a handy plug-in for anyone who, like me, prefers to compose blog posts (or of course websites) in desktop software in order to take advantage of all the power Mac OS X has to offer, then simply copy and paste the blog post as HTML into their blogging engine or CMS. This Simple HTML feature needs a little work, however, as it isn't creating entirely proper HTML just yet. Lists, for example, are created simply with <br> tags instead of actual <ul> and <li> tags, but it could do the trick for those who aren't exactly trying to pass every HTML validation test available across the web.

The VoodooPad plug-ins are provided for free, though some of them are still PowerPC-only. Demos of the $29.95 VoodooPad are of course available, with a $49.95 VoodoPad Pro version that offers a few key features for power users, as well as a free VoodooPad Lite version for those who don't need quite as much.

We mention Hawk Wings from time to time here on TUAW, as it's a great blog for all things Mail.app. One handy resource of Tim Gaden's Mail-obsessed blog that not everyone knows about, however, is its ever-growing directory of plugins, in which Tim relentlessly tracks and categorizes all the 3rd party add-ons, scripts, haxies, tweaks and other Mail goodies. The list was recently updated with 10 new entries, ranging from Note to Self (inspired by Leopard's Mail.app Notes feature) and a Return Receipts AppleScript (you know, that feature where you can bug email recipients with a 'yes I read this' dialog) to a Mail to Yojimbo script for those times when the 'print to Yojimbo' service is less than convenient.

Check out the recent update and the full plugin directory for virtually any and every tool you could need to make Mail.app bend to your every whim.

If you want to play with the Firefox betas, but don't want to break your existing extensions, there is an add-on available that can bring your existing extensions along for the 2.0 beta ride. Nightly Tester Tools is an add-on (extensions are being rebranded as 'add-ons' in the new Firefox) that brings a number of developer-related features to Firefox, but it does two fantastic things for regular end users like you and I: it can make *most* extensions/add-ons work with versions of Firefox they weren't necessarily meant to, even new ones you want to install.

Long story short: the way I understand it, Firefox add-ons need to specify which version of Firefox they're compatible with, in case there is version-specific code they require to function. Most add-ons, however, don't have that version-specific code, so Nightly Tester Tools (basically speaking) futzes with add-on version lists so (ideally) more recent versions of Firefox - i.e. this shiny new 2.0 release - can use these add-ons just fine. The one catch I've personally run into is that it seems Nightly Tester Tools needs to be installed on a v1.5.x of Firefox in order to be able to work with v2.0 (ironic, isn't it?). I stumbled across this because I recently wiped my MacBook Pro and reinstalled Mac OS X (I needed to start from scratch to get that new version of Vista running on my MBP). Along with this fresh system, I tried installing Nightly Tester Tools into a Firefox 2.0 beta, and it wouldn't budge. Turns out I had to degrade to 1.5.x, install Nightly Tester Tools, then bump up to 2.0, but YMMV.

I need to give a shout out to Download Squad, as it is they who first found this add-on which makes playing with Firefox betas so much sweeter.

I could've sworn that Download.com got rid of their Mac software section a while ago, but alas: digg submissions never lie. CNET's Download.com has posted a list of top iTunes add-ons for tackling everything from grabbing album art to watching who is listening to which songs from your library. Included in the list is RadioLover which lets you record streaming radio, as well as iPodRip with (thankfully) an accurate explanation as to why its abilities aren't included in iTunes itself. This list actually part of a guide Download.com wrote called iTunes Advanced, which includes some handy tips for things like adding an equalizer column to your list of songs to easily assign custom EQ settings to specific songs, as well as a list of hotkeys for the default iTunes visualization mode.

Seasoned iTunes pros will probably balk at getting iTunes advice from Download.com, but there are probably at least a couple handy tidbits here for just about everyone.

Unsanity has released a Universal Binary version of Application Enhancer, their software preference pane (and set of frameworks) that enables their various handy system hacks and UI additions. Along with Intel Mac compatibility, this update also includes enhancements like:

• Redesigned the preference pane to be simpler and more accessible.
• Now follows the precedent set by other Mac OS X services and disables itself if the shift key is held down while booting.

While Application Enhancer and some of their products are Intel-friendly, you should check their full compatibility list for details on exactly which apps have made the leap, as some are in a public beta testing phase.

Application Enhancer is free and available from Unsanity's website.