Hmm, someone said something about actually making one. I have always wanted to try something like this. Not actually making a keyboard from scratch of course, that would be... well beyond most people's abilities. No I mean taking a regular, wired keyboard, and making it wireless.
Probly a dumb idea, but isn't there some way to hack part of the cord off a wired keyboard and then splice in some kind of transmitter? Could that ever work somehow? Guess not. I mean I know that you would still have to use battery power to power your keyboard, but part isn't impossible.