Hmm, just recently I was looking at getting myself a Palm Zire 72, and you can get it along with a GPS system. You would end up needing an additional expansion card (not too much money) but you can get free shipping and a $50 rebate too. I believe they use TomTom to get the job done also.
www.plamone.com http://www.palmone.com/us/products/h.../index_gps.epl
I don't believe that the package with the Palm is as advanced as a stand alone GPS but from what I have hear, it works out pretty well for someone on an average trip. I thought about buying a stand alone GPS unit, but then really stopped and thought that I wouldn't use it too too much, so I didn't need anything too advanced, just enough to get me in the general area of where I want to go. I can get that with the palm, along with a built in camera, mp3 player, calender, blah blah blah.