To learn a little more about Go, try going through the tutorial that is listed above. (and below in the post)

http://playgo.to/interactive/

I've almost made it through the whole tutorial, and I believe I at least have a beter understanding of the game. Far from an expert, but hopefully I know enough to be able to win against other non-experts.

some good other sites for learning go are:

http://senseis.xmp.net/ (a lot of stuff, structure like wikepedia)

and for them who can wanna test their skills:

http://www.goproblems.com/