Does the Samsung Galaxy S have an FM transmitter? I seem to recall seeing a review of the Samsung Galaxy S that said it has an FM transmitter (so you can listen to music from it on your car radio, for instance).  However, I didn't see it mentioned anywhere else.  

Does it in fact have such a transmitter?
Early promotional material for the Galaxy S said that it had an FM transmitter.  Samsung later removed this from the list of features.  Some models, such as the i9000, have a FM receiver.  It appears other versions also have a receiver that is not supported by drivers;  This XDA thread has more details.

Your best bet is to get an FM transmitter than plugs into the headphone jack, or to use Bluetooth.