Small is beautiful, TINY is a HUGE improvement! Particularly if it comes with the extra function of being able to listen to MP3s via the FM transmitter. How that is supposed to work we don't know (yet) but our review unit has just been FedExed from Taiwan so we'll tell you soon! Official announcement of the Qstarz BT-Q920 is December 20.
And HOW tiny you ask? Try 5.9 x 4.4 cm. That's about 2 inches square.
Not bad for a SiRF Star III receiver with bluetooth and music...

And check here for our earlier review on the Qstarz BT-Q810