Talk:Bluetooth Wireless Communication
I have managed to achieve something similar, but using XBee (rather than Bluetooth), RAMPS 1.4 & SD-RAMPS.
Hardware components are:
. SD-RAMPS 
. XBee wireless communications - you need two XBee modules, a "shield" to connect one to the Arduino on the RepRap, and the "Explorer" dongle to connect the other to your PC, plus miscellaneous jumper wires etc. You can buy the components separately, but I already had all the bits I needed from my Sparkfun "XBee Wireless Kit" which I bought from Little Bird .
I have got it working succesfully at 38,400 Baud.
Full details are on my blog: