Engadget has a post on Motorola's bluetooth adapter. It adds Bluetooth functionality to Motorola cell phones that have a data port. The prices is pretty good, as it is only $39.99.
I will buy one of these for my T720, if I can verify that when using the bluetooth adapter it works with iSync. The phone currently work with iSync with the USB data cable. Also, if I bought it, I would think about buying the BlueTooth Car Kit. It does look like the car kit will only work with the V600 and the Timeport 270c. Maybe iw will work with my T720.