ill give you guys a quick review....
it basically charges every recent ipod, ipod touch, and iphone (including 3G). RDS (the name of the song that is playing will scroll across your car's fm screen, if it supports it) works nicely too, although it says iTrip - name of artist - name of song. it has 2 hidden/"international" frequencies which are 87.7 and 87.9, and unfortunately for me, the chicago area uses both of them so im out of luck. the transmitter also has "smartscan" which scans and puts in the 3 best clear radio stations. the length of the cord is very long, so long that even people in the backseat of your car will be able to reach and use it. handily, on the dc power plug itself, there are previous, play/pause, and next buttons on it, but for me, on my ipod touch 2G, they only worked when the ipod was on and not sleeping. also on the dc power plug, there is a circular light that changes colors to tell you how much battery life the ipod has. green = excellent, red = charging, etc.
overall, i think its a great transmitter. i just hate that it went down in price VERY quickly after finding it much cheaper than anywhere else (walmart). anything else you guys want to know about it?