If you use Twitter via the web, you can simply click the trash can next to that last tweet that had a typo or - *gasp* - you realized all too late shouldn't be public. If you use something like the TUAW favorite Twitterrific from the Iconfactory, however, you're at a loss, as it features no such trash can. Fortunately, Daniel Jalkut (of such fine Red Sweater Software products as MarsEdit, FlexTime and FastScripts) has posted enough embarrassing tweets to warrant the creation of a Twitter undo AppleScript that automates the deletion if your previous tweet, and he is provided it free of charge from the Red Sweater Blog.

By default, all you need is Jalkut's excellent FastScripts product (either the commercial version or its free little brother), and you can simply follow his brief instructions to get set up with a Twitter safety net. Note that if you use external apps like Twitterrific you won't actually see the tweet disappear from your account. However, if you see the delete confirmation that Jalkut's script is designed to display upon successful operation, the tweet should actually have been deleted and you can check your actual Twitter.com account page to be sure.

Now, I'm not a big puzzler myself, but I do know lots of people out there enjoy the thrill of completing a tough crossword puzzle. Red Sweater Software has just announced the release of Black Ink 1.0 (formerly MacXword, Red Sweater Software has been on an acquisition tear as of late). Black Ink downloads puzzles from a number of free sources (including the NY Times). It allows you to print out puzzles for solving on the go, and it also includes a timer so you can brush up on your competitive crossword skills.

Black Ink costs $24.95 and there is a 30 day demo available. Users of MacXword can upgrade for $9.95 (with a valid serial number).

Just a scant 4 days since Red Sweater Software acquired MarsEdit there is a new point release available. Now that's quick turnaround. MarsEdit 1.1.3, as you can imagine, is mostly a bug fix release but it is free to registered users and fixes the following things:

• Fix a bug with LiveJournal blogs that contain Unicode chars
• Fix the infamous "Preview Flickering Images" bug
• Fix a slow memory leak when text filters are applied in preview

Sparkle, everyone's favorite updating engine, has been added as well. I can't wait to see what future releases have in store for us.

MarsEdit is my blogging client of choice. It is simple, straightforward, and streamlined (unlike Ecto, which I also use and enjoy). Today we found out that MarsEdit, formerly of Ranchero which itself was acquired by NewsGator, has been acquired by Red Sweater Software. This is good news for all MarsEdit uses since NewsGator is much more focused on NetNewsWire, and the future of MarsEdit didn't look too clear.

Check out this Q&A with Brent Simmons, creator of MarsEdit, and Daniel Jalkut, the man behind the Red Sweater, for some insights into the future of MarsEdit.

Updates to MarsEdit 1.x will continue to be free for registered users, and new users can pick up a copy for $24.95.

FlexTime 1.0 has just been released and time obsessed Mac users rejoice! What is FlexTime? Some might call it a timer, but it is a very advanced timer. You can build 'routines' based on timed intervals, which in turn can cue you with a number of different cues (i.e. it can play a sound, run a script). This is a very slick app that some people will find extremely useful.

FlexTime 1.0 will run you $18.95 and requires 10.4. There is a 30 day demo available.