The championship for RPS was recently concluded, commissioned by the World RPS Society (who else?).

If you don't know how to play it (good God!), here are some basic rules. For more advanced players, you can learn some mad skillz like The Crescendo, or the Avalanche (which is rock-rock-rock, of course). There's even an online trainer if you want to practice your RPS skills.

And, if that isn't enough education, check out the Official RPS Strategy Guide.