A couple of my friends played competitively, and I joined them a couple of times as well.
I just liked playing as ZSS and Snake, I think I was good but my friends were waay better than myself. My one friend is pretty good, he has a couple of video's on youtube of marth, but his main has been metaknight (lol) for a while. According to this
http://www.smashboards.com/showthread.php?t=2907 43, he's 4 in Ontario, and another friend is on it too, but hes just on the honourable's list.
I'm hoping with the inevitable announcement of project cafe at e3, we'll see a new smash bro's game as well - hopefully with no more tripping XD (and more 3rd party characters)