Cheddar Promo by Sam Soffes. Cheddar keeps your world organized. It's easy to use on your iPhone, iPod touch, iPad, and on the web. Cheddar is super simple and instantly in sync on all of your devices.
Lovely minimalistic app, but no built in cleverness (apart from checking your location). There are themes for *scorching* (hot?), *cloudy* and *twilight*. A clever app sets the theme automagically. And would update the status regularly.
NTT forces you to pay attention during a video conference (video)