[dkozel]

You can do a very simple, though somewhat permanent, modification to the dongle and receive DC-14MHz. http://www.rtl-sdr.com/rtl-sdr-direct-sampling-mode/

[userbinator]

There's a software modification here which is also interesting:

http://superkuh.com/rtlsdr.html#directsample

The whole idea of the community figuring out hacks to use this hardware in ways that were never intended by its original designers, including exploiting bugs/artifacts, reminds me of the demoscene.