Pretty cool. I made something like this for Windows Phone a while back that would let your routes to & from work, and your estimated departure times. It would then run traffic data on a server before your departure time, and let you know how long your commute would be. It would then track the times historically and let you know the best times to leave.

http://www.windowsphones7app.com/windowsmobileapps/4/2011-03...