For awhile now, I've been wanting something that could answer the question: "What are my friends doing right now?"
There are probably already approximately 200 apps that do this, but for some reason I couldn't find one that worked the way I wanted. So instead I took the evening and hacked together nerdsz (pronounced "nerds-zee").
To use it, enter the twitter usernames of a group of people you're interested in. For example, http://aaronboodman.com/nerdsz?aboodman,ev,biz,goldman.
PS: You may be wondering about the name. For years now, I have been calling the group of friends I hang out with the nerds. The z is an inside joke that you probably have to work for Google to get. Sorry about that.
PPS: This hack made possible by twitter's awesome, crazy-easy-to-use API. Thanks!
PPPS: I also borrowed John Resig's PrettyDate.