I bought my mother Magellan portable GPS with Traffic (FM Traffic link), and found something interesting.
It came with an adapter/traffic link which can be found below link.
http://www.jr.com/magellan/pe/MGN_TRAFFICLINK/
The Magellan GPS alone does not have the traffic support itself, but with the adapter, traffic gets updated.
I didn't get a chance to try it out with the TP2, but if it works, it's a sweet deal IMO.