The name of this product is certainly a mouthful, but DeLorme is a company well known for its paper maps. It has introduced a laptop-compatible GPS receiver unit and a Street Atlas USA 2009 mapping software, at a price of $60.95.
 

The DeLorme Earthmate GPS LT-40 package
 

The Earthmate GPS LT-40 plugs directly to your laptop via USB and has a high-sensitivity WAAS-enabled GPS receiver. You will also like the improved interface of the Street Atlas USA 2009 software. You can get navigation cues, as well as a wide, 3D perspective of your route.

Turning your laptop into a GPS device is also possible with the Garmin Mobile 10 GPS receiver. This GPS receiver connects to your laptop via wireless Bluetooth technology. When you buy the package, you also get the Garmin Mobile XT and nRoute navigation software. The software is particularly well thought out, with features like address lookup, voice-prompted turn-by-turn directions, saved routes and a points of interest database.
 

The Garmin Mobile 10 Laptop GPS

Well, betcha didn't know Microsoft made GPS receiver units. Well, in fact, Microsoft does produce such stuff to turn laptops into GPS devices. The Microsoft Streets & Trips 2008 GPS unit is a high-sensitivity model, and plugs into your laptop's USB port. The package software allows you to use novel features like automatic re-routing, a perspective map, day-night backlight modes, as well as voice-prompted directions.
 

The Microsoft Streets & Trips 2008 GPS