Recommended Links:

metagame.com
Upper Deck Entertainment's official strategy article site for VS System. Great pool of information that will improve your game. A couple of writers for this site are from Toronto!

vsuniverse.com
A very popular site with lots of deck lists, many message posts on building those decks, and strategy articles from Pro players.

upperdeckentertainment.com
All the official tournament rules for sanctioned VS System play as well as a judge certification program, FAQ's and player ratings.