To post an update on Loopt, sign up for an account on Loopt's site and log in. Sign in on the iPhone, and select Settings, then Link Up! Tap the Twitter icon and enter Twitter's login information to activate Twitter Link. Select What's Up in a talk-bubble icon at the bottom of the screen. Enter text where it says, "Type here to share what's up," and tap on Location to update that with the drop·down menu. Then tap Update. The text you entered will push to Twitter, complete with URL to a map of your location.
