I'm loving the snazzy new Foursquare UI in the latest software update.
Of course, this new awesomeness comes with some lag time on the display and updates, but I'm chalking part of that up to my having 993 Foursquare friends. Having complained about the friend limit before, I can see how having more than 1,000 friends could lead to lag times similar to that of Facebook. I've got 3500 some odd friend on FB. Go figure.