I just stumbled upon the coolest a cool site for anyone who likes to bang around on a guitar: chordguide.com. You just click on the root note to get a list of chords. You can make your own list of chords, with fretboard images showing the finger positioning, and click on a chord’s name to get variations. It’s so easy that it almost makes me want to dust off my old guitar and hear what all those funky chords sound like.
Update:For an even cooler site, check out Chordbook.com