Bluetooth has 3 power classes: class 1 with range of 100 feet (30m), class 2 with range 10 feet (3 m), and class 3, which I've never seen. You want class 1, and that's fairly common.
I've done what you want to do in the past. Two links for you:
http://www-personal.umich.edu/~erelson/BluetoothCar.html - My guide probably not completely finished and ultimately not touched in years.
http://www.societyofrobots.com/robotforum/index.php?topic=1672.0 - Thread where I trouble-shot bluetooth problems.
http://alex.seewald.at/BlueCar/ - The original guide I found. There are other hardware options than the MiniSSC servo controller, but this was my first electronics hack evar, so I was cautious.
Feel free to ask me questions (PMs will get my attention)
-Gert
(made a couple tiny revisions just now to my guide page, mainly discussing the bluetooth at the computer end)