1. You have to pay $18 or $36. A one time $36 activation fee still applies to 3G plans, the way it did for the first generation iPhone. If you're a current AT&T subscriber, this fee is only $18.

2. Data costs more. On the original iPhone plans, unlimited data cost $20/month. The new iPhone 3G plans cost $30/month.

3. Exchange costs $15/month more beyond that. The normal 3G iPhone data plan costs $30/month. Enterprise data costs $45/month. This buys you access to all the standard Exchange features. If you need to get Exchange mail, or access data inside your firewall, you're an enterprise user. AT&T isn't saying they'll disable ActiveSync and Exchange on normal iPhone plans for non-corporate users so we're unsure how they'll police this policy. Our Christina speculates that the enterprise plan sets up the server to accept exchange support; you could do IMAP from your exchange account but if you want non-MobileMe push, you gotta be on the enterprise tier plan.

Follow the jumps for more plan pricing details.

TalkiPhone has posted their 101-question-long iPhone FAQ. The FAQ, which runs the gamut from "Are AT&T stores really going to open at 6PM on June 29th" to "Will the iPhone support Adobe PDF documents?" collects information from around the Internet and combines it into a single easy-to-search document. The FAQ is clearly a work in progress and some of their answers differ from what I have been led to understand, so take the information there with a wee grain of salt. You can always review our iPhone posts for more tidbits on the greatest gadget since the sliced-bread slicer.

Thanks Chris

And what happens when you've purchased so many tracks that your final complete-the-album purchase price is less than the cost of a single track? You're out of luck. You can't complete an album that you've already paid that much for.

Plus complete-my-TV-season isn't available. Bummer.

Apple recently posted an iPod Game FAQ to answer all your frequently asked (and not so frequently asked) questions about the iPod and its games. As you probably already knew, you need a 5G iPod or later to take advantage of the $4.99 games. You cannot, however, output the video to your TV as you play. And you can use localized game versions--change the iPod's language and the games will relocalize to that language. I hadn't realized that Vortex and Texas Hold'em were Apple in-house products. The rest (like Zuma, Tetris, and so on) are authored and supported by third-party companies.

Apple support just posted a general Frequently Asked Questions list for Microsoft Vista at its site. Vista, which just launched, will be generally available for purchase in January. At this time, iTunes, QuickTime, Software Update and the iPod shuffle reset utility are all unsupported under Vista.

However, secret TUAW elves (*kof*David C.*kof) who have been testing Vista report that iTunes and QuickTime 7 worked flawlessly under Vista even if they're officially unsupported.

Apple promises to keep the FAQ updated over time as the facts change on the ground.