Topic: Behold...

[Lashen]

That is pretty freaking awesome! Kind of makes me want to install LEDs in my showerhead now...but probably due to lazy and fear of messing something up and zapping myself I won't. 

It's actually powered by water pressure alone, somehow.

I don't know, "black magic."

I think they sell those at thinkgeek.com actually. Quite the nifty little place.

I'm fairly certain they do/did. I received mine from: http://www.magicshowerhead.com/

There are many options, but I chose a fixed, single-color showerhead (because I'm boring like that).