This is a good idea but it doesn’t go far enough, it needs a wireless communication capability. Having to carry the unit with you and manually update the database is cumbersome. Incidentally, digital cameras also suffer from not having integrated communication capabilities, it would make sharing digital images so much easier.

Cobra’s jump forward with the XRS 9960G is to isolate the GPS unit on a USB dongle that can be plugged directly into your computer for daily updates to the AURA database. Previous Cobra GPS units were big, dangly things that sat awkwardly on a dash, but the new USB unit is the size of a USB key, turning what was once a cumbersome accessory into a small, easy-to-use convenience.

[From Cobra's New Radar Detector Makes Adding Speed Trap Updates Easy - Popular Mechanics]