The N900 is useless with Bluetooth Headset. Something is bung up with their Wifi chip with the bluetooth. Wifi + bluetooth on the same chip is just bad design. One cannot work without another but one can work without another.

For example if you're using BH, then it gives you this bad sound quality (similar to robot) but then turn on the wifi during the phone call. The sound quality improves by almost 60% clearer. So is this the design problem with hardware or software issues? I updated to 1.01 and I can tell you that it somewhat make my N900 slower than before and CPU usually hit the roof.