2B
One of the OSX Bluetooth firmware updates from earlier this year added the headset profile to make the Jabra unit work. I have given up on mine, both with the Powerbook and my Siemens phone, I don't know who the culprit is, but the connection constantly drops. Let us know how it works for you, I don't know where the blame lays, with Jabra, Siemens or Apple's brew of Bluetooth.
I suspect it is not apple because my BT500 mouse constantly works as does Bluephone Elite for OSX and the ability to send midi & image files to my phone, but I have given up with the Jabra headset, because it disconnects itself and is too difficult to relink while driving
I am totally jealous of your U2 library and would trade anything for that collection in a lossless compression format.
Love and Peace or Else.....