If anyone is interested in purchasing a GPS unit for the car, consider the Dash Express
I've been a beta tester for Dash, so I don't get paid by them, but I have walked through part of the development process. I am very impressed by this unit and would recommend it to anyone who's looking for a new device.
You'll have internet connectivity on the Dash Express GPS. This means you can search on Yahoo and receive live traffic data from the internet. The device updates itself. The Dash uses GPRS and Wi-Fi to maintain its internet connection. The traffic data comes in very handy if you commute. You can send addressess from your computer directly to your device.
What's more, the Dash allows 3rd party applications! This is a unique feature and I'm curious to see what types of applications will get developed.