I picked this up for myself as a late Christmas present earlier this month (pre-DROID):
Mp4 player w. built in-FM transmitter 2gb storage, SD & USB-stick storage slots
Car MP3 MP4 Player with Bluetooth (Black)
It's a great device if you are stuck using a stock CD player. Connects instantly with my DROID for phone calls and any media audio! The third party devices like these are awesome, but I truly believe that if one of these new smart phones had a simple FM transmitter built-in they would be PERFECT.
If you order from them be prepared for the UBER shipping charges from Guandong, China. I got this and the "iron samurai" watch (which arrived broken. lol. )