One thing I am pretty into, but haven't brought up here yet is Shortwave and Pirate radio. The shoe company Palladium has released a very nice documentary that covers some of the pirate radio activities going on in London. If you're interested in getting into this stuff, I would recommend picking up a worldband radio. Grundig makes decent inexpensive radios. I personally use the Grundig G5 with a fold out Sony portable antenna that suction-cups onto a window and then the M-Audio MicrotrackII is always set to record the line out on the Grundig. With this setup I've generated about 10GB of sounds and odd broadcasts. Lots of fun stuff to be heard. If you don't know anything about Shortwave radio, wikipedia is the best place to start.