The FCC has just approved the Garmin Nuvi 660. According to the FCC's website, Garmin will release the 660 sometime between October and November (so as to cash in on the usual holiday spending frenzy). The FCC site only shows the back of the unit (thanks a lot!), so we'll have to speculate on design for now. Although we can already see that the 660 will have a single speaker, and a flip-type patch antenna. We can probably also safely assume the 660 will use the new SiRF Star III chipset. Other details that have emerged so far:

• 4.3" screen at a resolution of 480 x 272 pixels (a nice upgrade compared to the Nuvi 360's 3.5-inch QVGA screen)
• Bluetooth
• Built-in FM Transmitter that lets you listen to voice prompts on your car stereo via FM
• Ships bundled with either the Garm