two screens from the Flash Mob Application I am working on with a small team at the iPhone Dev event.

It is an experimental mobile app that allows anonymous flash mob event sharing and joining. Sign up, select a set of locations, and wait for SMS and e-mail notifications of flash mobs in your area. Or create a flash mob community by adding events that are then broadcasted to all users who've opted in to your locale.

Here are some of the tips and tricks I have learned while doing UI for this application:

and some of the origination ideation: