Hey Guys,
for a few weeks now I've been using the bluetooth kit from caughtbluehanded.com
It works well with my bluetooth phone - has steering wheel integration to allow placing and receiving calls; audio comes thr' the BMW speakers and install is a snap. The price is right too.
This kit should work with any early X5 (with 25 way phone connector, I *think* this is models up until about 3/02) and with any bluetooth phone that supports handfree/headset profile. I've prepared an install document and UCrewX5 has posted it here :
caughtbluehanded Bluetooth install in '00 X5
Scotty