I deeply urge everyone interested in go to try to play it in person. Nothing beats a live face-to-face game against someone and then being able to review it on a board afterwards. You'll also find that the people who go to go clubs are very friendly and generally love to teach beginners.
There are a surprising number of local go club around the country: http://www.usgo.org/where-play-go
Especially, if you're in the SF Bay Area (my area): http://bayareago.org/#local-clubs