I put together a quick video (no audio) of some things I found in the 2.4GHz spectrum with the Great Scott Gadgets Ubertooth One:

In this gripping video, you'll see idle and busy Wi-Fi signals, Bluetooth discovery, and a leaky microwave oven! It's kinda like being in The Matrix…

Consider picking up an Ubertooth if you want to do some Bluetooth or RF hacking. Everything (including the hardware) is open-source, and there's a growing community of people developing software for the Ubertooth. The next few months should be very interesting!