If anything down the road you'll need iSync to sync with the G4 via BT as of now iSync doesn't offer BlackBerry on it BT compatibility list. The only real USB data sync option for the Mac at the moment is PocketMac BlackBerry Sync.
cool thanks y'all . I have the pocketmac application. I works nicely for the sync but doesn' allow any data sharing beyond that - e.g. pic, docs, midi files.
thus I am relinquished to emailing myself that stuff.