Navizon had a great idea providing jailbroken iPhones with an ability to emulate GPS through tower triangulation, but it only gave somewhat accurate information. Partfoundry has developed a working prototype dongle for the jailbroken iPhone that provides real time GPS locationing with an accuracy of 16ft-32ft using the SiRF Star III chip. It's sleek look definitely goes well with the iPhone. Though the dongle makes the iPhone a bit bigger, it can always be removed and used when needed. The dongle will be available from February 2008 at a respectable $89. Be sure to check the working prototype video after the cut.

[Via TUAW]