I am a sucker for data vizualization projects, especially when it comes to news and stock prices (my roots I guess, as this is what I was building as a young C developer). I particularly like this one: What’s Up, a news map display developed by Jeroen Wijering, a UI designer recently graduated from the Eidhoven Design Academy. It basically displays headlines from a bunch of news (geolocated) RSS feeds on a planisphere. Jeroen says that he plans to make this available as a screen saver at some point.
You can launch it full screen here. Very cool.