I've used Fetch, and have done for the last 2 years... the current version is very stable, no problems thus far uploading large files, and I particularly like the integration with BBEdit/Lite - you can download any text file and have the option in the 'right-click menu' to open it directly in BBEdit/Lite. Truly a great time saver for me as I have to make textual updates and changes to my phpBB forum almost daily.

I'm also in the market for a FM transmitter for my newly acquired iPod Mini, so I'd be interested to see this thread grow with additional suggestions.