While Loren Brichter may be hard at work on Tweetie Two for the Mac , he hasn't given on his baby: Tweetie 2 for the iPhone. While the app hasn't been updated since late November, a new build is due shortly with one big addition: native Foursquare support. What this means is that anytime someone in your tweet stream sends out a tweet from Foursquare (which, to the annoyance of some users, happens automatically at times), that Foursquare link (shown as a 4sq.com URL) will be able to be opened in Tweetie in a way that displays the location information in a nice format. When a tweet is eligible for this feature, you'll see a purple square logo in the upper right hand corner of the tweet in Tweetie.