Compatible ?
Well...yes and no.
It does have a USB cradle, but it requires windows...so I guess you will need VPC (which I have).

As far as bluetooth, it's quite new.
I have heard rumors here and there that apple's new computer line will have bluetooth but I have not heard anythign definite.

For now this PDA is the only PDA with bluetooth, and ericsson mobile phones like the T39 and the T68 have/will have bluetooth. As the technology matures more devices will have bluetooth I believe which is cool ;) No need for wires, and no need for line-of-sight data transfer (which is the case with IR ports).

Of course first generation bluetooth is "slow" but I believe it will get better :)