How 'bout this: Pull the drive out of the old one, plug it in to a $19 Seagate GoFlex USB 3 adapter, transfer the data, and put the drive back.My thoughts also, it's a miss on Apple's part not to have a bridge between their old technology of Firewire to the new Thunderbolt upon release of the products.
For now I am using File Sharing over WiFi between my old and new computers.