Rugby Video Games?

I am wagering we have a few Rugby fans here. I know jack squat about the game, but recently sat down and watched a match. So, I now have an interest in learning more about the sport and giving a video game a shot about it.
Anyone have a good place to read up on the sport and start learning the rules?
Also, a game series that I can get here in the states that has a fairly sim/realistic approach to the sport?

Thanks.

you could get the new rugby challenge game which has a video in it that has a basic overview of the sport http://rugbychallengegame.com/ i recently bought it and i rekon its pretty awesome