Which FM transmitter do you use?

[inkadinkadoo]

I use a Belkin Tunecast. It works well with the Express (though it could have a bit more volume; the Express is quieter than my Sony CD player or the Sansa Clip). Two AA batteries for ~7 hours, any station, four presets and it remembers the last station when changing batteries. Got it only sale at $27, circuit city.