Clearly the winners of the liveblogging competition were the guys at MacRumors. Their AJAX-powered interface gave news updates in a timely manner, and their photo feed was showing relevant photos at the right time.
Second place goes to Ars Technica, for their almost-as-up-to-the-moment feed as MacRumors, combined with a little more commentary (the MacRumors stuff was a little dry). They get dinged on the slow and ill-timed delivery of photos, and their non-AJAXy goodness. The refresh button is so 2006.
Third goes to Macworld magazine, which came through with the most in depth coverage, giving links and perspective. Guess it helps to have an editorial staff at home to rely upon.