Well tbh camera seems easier at this point, since it does work in donut at least, however bluetooth does not work in anything other than native android devices at present, if there were a breakthrough in bluetooth in another device then there would be more hope, but at present, if you don't have an android phone, you don't have bluetooth.
In the last 4 moths I have seen android on kaiser go from an ugly mess of hacks and patches, to an almost complete mobile OS, one step at a time, I suspect bluetooth will be the very last thing to get fixed.
XDA IIi ROM: 1.11.00 WWE Radio: 1.04.0 ExtROM 1.11.171 WWE
HTC Kaiser 1: ROM: Polymod 2.1D Final-Dark : Radio: 18.104.22.168
HTC G1 Dream: GammaFly V1.3 RC2, AmonRa, DangerSPL, Radio 2.22.27.08
Polymod 2.1D Final Version: It's Alive!
Android boot splashes and boot animations
(for Kaiser )