While I am actually logged on. Here's the first part to an excellent beginner's tutorial to Super Street Fighter II Turbo. This shows how much depth the series really has and it's an excellent introduction to play the game other than "mashing dem buttons".
Super SF2 Turbo Beginner Tutorial (Part 1) by David Sirlin (http://www.youtube.com/watch?v=d0cFs5mHQC4#)
Whether or not you like or even know about Street Fighter, I'd highly suggest you to check it out as it's a good appreciation of how deep video games can be.
David Sirlin also made a good Super Smash Bros. tutorial that explains that competitive side of the game. Be sure to check it out after the break!