See this post:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1187252763/1#1
I think it is possible - you'll need a USB->serial converter (FTDI cable or breakout board), plus you have to put the BT into "reset mode" (?) before you can use the RX/TX lines (pins 0 & 1).
But from what I can see from the ref design schematic:
...and that thread above - this is all you need to do (then pick the proper board for the connection, of course).
This is all an educated guess on my part, though...hope it helps!
