I finally picked up a Go set while browsing at Toy House in Jackson. Coolest tutorial site I've found so far is Sensei's Library, filled with info for beginners plus exercises and discussions between experts or afficianados. I have a long way to go before the beginners' exercises are within my reach, but it looks pretty good. They also discuss variations in rules and scoring, very helpful since no two sets of instructions seem to agree on how this game should be played.