605 WiFi. True to its name, the unit holds the 605 in your car and pipes steaming hot GPS data into the unit. With that 4.3-inch LCD to view the maps it's certainly a fitting match, and features include full voice navigation. There are three versions of the device, one for Europe, one for North America and one for China, and all of them will work with all sizes of the 605 WiFi. It'll be available in May for $130, or bundled with a 30GB 605 for $400.
[Thanks to everyone who sent this in]