Huh. I must've missed the thunderous boos at the pregame performance. When I tuned in everyone was cheering their fool heads off for Kanye, who by the way, saw his album jump to number one. Then at the break, I watched a Pepsi commercial featuring who else? -- Kanye West. Doesn't seem to be having too much of a negative effect on the guy. In fact I'd say it's doing just the opposite -- quite a few people have now heard of him, who otherwise wouldn't have for perhaps quite some time.
Proper forum or not, his comments got people talking and shook people up a bit. Seems to have boosted his career a bit, too -- not that it was in any particular need of help. Go Kanye.
(BTW, I can't stand the guy's music and think he's a moron for reasons completely unrelated to his comments about Bush...honest. But I do like some of Jay-Z's stuff, and i think I heard he produced quite a bit of that (?)).