OK, my story so far: I have a MBP with built-in BT, and a TiBook without BT, but a dongle. I got it to work with the TiBook with the Kensington dongle finally, by repetition. I kept deleting it from devices and re-running the jar file. Eventually it took. Boy, that was a pain.
Sadly, however, I still don’t have any more success than I did before. The pen picks up a little better than it did on the MBP, but it’s still unusable. This is odd, because it works on the MBP under Boot Camp/Windows XP with Johnny Lee’s software.
So the only hardware change is still the BT adapter. Windows uses the Logitech one, while OSX can’t. I’ll have to test the Kensington dongle with XP, but I’d really like to pair the WiiMote to the Apple Built-in BT under XP. I haven’t been able to do that yet.
If anyone else has some more ideas on what I could try I’d love to hear it.