Has anyone had any experiences with this product?
The Car-Pal OBD-II Vehicle Interface Unit (Bluetooth version)
http://www.car-pal.net/
It claims to support all the protocols and connects via bluetooth which is what I'm after for a clean, wireless hookup to my PDA. It's a lot more expensive than say the Tactrix cable, but if you try and convert the USB -> Serial -> Bluetooth, it'll end up costing alot more and with adapters going everywhere.