UPDATE Jun 2008: Dash is now $100 cheaper! You can pick one up at Amazon.
I'm probably the biggest evangelizer of Dash Network's Dash Express GPS device. The Dash Express is the first two-way Internet-connected GPS navigation system delivering traffic and destination information in wicked new ways. The Dash Express is the next generation of GPS technology and it's available today!
Unique to the Dash Express, you rely on the Dash Driver Network to provide the latest and most accurate current traffic information available and with features like emailing your Dash Express addresses for your next generation and MyDash which allows you to Browse the Dash Network library of user-created and locally relevant searches such as “Movie Times” and “Great Steakhouses”.
Suggested Price: $399 $299