Yes, and I haven't done anything with it yet but I wanted to make a project out of it. I just haven't got around to it yet. There are a lot of really cool things people have done with them like make super computers and hand held gaming systems. Check out these links:
I wanted to monitor network trafic and learned to use linux and mess around with it as though it was a server, it looks like its going to be used with an arduino soon because I ordered loads of bits, its going to run a sentry gun to get pigions of the balcony.
It mugt be web operatable too, I will send you guys the link to pidgin cannon first if you like.
Can weather balloons be equipped with a BB gun? I don't think so. :P
(Well they could, but what if it gets shot down?)
I want to set up a dirt runway in my backyard and watch footage from a TV if my electronic/programming skill is good enough. Devon showed me a cool tutorial on radios, maybe I can hook a camera and send video instead of sound.
I have to design it to be efficient, I actually built a plane in tech class, maybe I can copy something.
I have 2, I intended to use them as a uPnP DLNA client (media client) with raspBMC for my TV. raspBMC is a port of XBMC (XBox Media Center).
Un fortunately, both have an issue with the 25 GHz, crystal oscillator which I managed to get working for a few minutes on each by sticking the PI in the freezer and tapping on the oscillator. But it died shortly after that.
Tempted to get a third because it's unlikely I'd have the problem 3 times in a row.
I've been meaning to use mine for audio multiplexing but I never got around to it, plus a change of circumstances has negated the problem that I was trying to solve; namely, I had a PC and Xbox that both produce audio but only one set of speakers.