Here's a cool app that shows live traffic feeds while navigating, and traffic congestion alerts. This is the Bell Galaxy Tab in Canada:
http://www.youtube.com/watch?v=KhD2yuq-GCk

The UI could use some refinement (a lot actually), but it's a pretty cool concept.

It indicates possible police speed traps, which is REALLY cool.

HAHAHA... It shows that the DVP (becomes Highway 404 - Toronto) is slow moving. I don't think anyone needs an advanced app to relay that bit of information!