Pocket Mac 3.0.
Honestly.
Seriously.
I have no idea how good the USB driver is...but I'm using the Bluetooth and TCP/IP connections for it and the synching for BOTH Entourage and iCal/AB - and it really is light years better than 2.0 ever was.
Look here for more details on my blog.
http://www.pocketinformant.com/forum...?p=12016#12016