Despite its special Silverlight-powered Website and more than 2,000 hours of online video, it looks like NBC flubbed its opportunity to make its Olympics Web revenues more than a rounding error. NBCOlympics.com may have streamed 72 million videos and racked up 1.2 billion pageviews, but Yahoo Sports still edged it out with an average of 4.7 million visitors a day versus 4.3 million (source: Nieisen Online). And Yahoo didn't even have video.