Update: A2DP support in Leopard working well

I've tested my Logitech Bluetooth headphones with my iBook (see photo below) and leopard, and everything is working smoothly. Audio quality is pretty good, and the whole idea of being wireless (unattached to your laptop) is great. My only gripe is the annoying beep you hear prior to audio being sent from your laptop to the headphones. This isn't a problem if you've got music constantly streaming through iTunes.