Ketchup, I do believe your right this is Bluetooth.
So if you simply want to scan and detect Bluetooth devices this can be easily achieved with an bluetooth enabled device. The simple bluetooth tools on a bluetooth enabled PC will scan and find other devices.
If you want to do something once you have found them, then the fun can begin.
Check out the hcitool, btscanner, and the other offerings within BackTrack and see where you can take your results.
I’ve wanted to play around with BT’s BT tools. What recommendations do you have for a Bluetooth adapter? I’ve seen everything from the mini adapters to the huge one with the diapole antenna/wifi combo.