Why settle for the standard stereo or a GPS unit when you can have an in-car PC running off your car's battery to guide the way, watch the engine, and download tunes?

3 Killer Apps For Your Internet-Connected PC

GET MUSIC FROM HOME:
Your car PC can connect to your home computer in real time and access all its media content. Use VPN software from Hamachi (free; hamachi.cc) to play music and podcasts from your iTunes library.

FIND YOUR WAY:
Add a GPS dongle for satellite navigation on a screen bigger than that of most dedicated GPS units. Not only can you get traffic reports, points of interest and Google maps; you can also pull up simulated 3-D images of your route.

MONITOR YOUR CAR'S PERFORMANCE:
With an adapter ($130; scantool.net) that plugs into the PC's USB slot, you can connect to your car's onboard diagnostics port to get real-time data on speed, rpm, fuel pressure, temperature and all those "check engine light" codes

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