WaveBird went up near 100 hours of play. A hell of alot longer than 30 hours...
Then again, the Wiimote uses pointer functionality, has a speaker, uses accellerometers, and has rumble to boot. So it's not that bad at all once you consider everyhing.
Even so, I'm sure someone will make a dock for the damn thing (especially since the Wii is looking like it might take-off).