Garmin Mobile 10
for a few extra dollars you can get the Mobile 20, it's a GPS receiver and window mount in one.
I ordered the Mobile 10 from buygpsnow.com for $120, best price I could find...setup was easy, works just like the NUVI interface...I have my routes for next week plugged in and ready to go.
Only issue was I couldn't connect to the internet with the bluetooth receiver going...probably an authorization issue.
If you travel much (like I do
), it's a handy tool for getting around strange cities. It even talks to me 
Bestbuy had 2 GB microSD for 24.99 last week, you'll need that if you don't have much memory.
GPS receiver is better than my Garmin 76CS, it will not pick up signal in the house, the Mobile 10 locked on full in the house.
Cool toy/tool at a good price if you wanted a Nuvi or TomTom...Thought I would pass it along.