I finally got my MacBook to tether through BlueTooth. I bought PDANet and it works amazingly! Although through BlueTooth the speed is capped due to BlueTooth speeds. Bluetooth speed on the Q is around 40kpbs. Using PDANet through USB in Vista it is super fast speeds. I have Vista Ultimate installed on a Dual Boot with OS Ten on my MacBook. Even at a low single I was getting 427kpbs download and 117kpbs upload. I am very pleased with it and happy it works.
I would highly recommend PDANet as an excellent tethering choice.

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Spint Motorola Q
3rd Party RadioShack Employee Account
$20/Month: 3,000 Minutes, Unlimited Txt, Unlimited EVDO Access. I love my plan