My buddy got me a Bose bt headset, and I was looking for a way to listen to music wirelessly via bt, for the Bose, and for my car's HU (I miss the FM transmitter from my n900). He suggested trying this app, and its working for the Defy, even though the dev states that its only for certain phones/roms. The sound quality seems compressed, much more so than phone calls, but the functionality is there. I'm not sure if it makes a difference, but I'm "rooted" via z4root, FWIW. Just a heads up.