Learning Guitar Chords for Songs

I've been looking around for sites that help with learning guitar chords for songs and I think I may have found an absolutely great one this morning. There seem to be a lot of sites pushing guitar courses and books that teach you interesting ways to learn but few of them give you any more of a brief taster of what's inside once they have your money. Justin Sandercoe has set up a fantastic site over at justinguitar.com with more free content than you can shake a stick at. In the last hour or two I've only scratched the surface of what he has to offer but I'll definitely be going back there to follow a few of his online lessons.