Might it have had something to do with the Twitter-based HTML demo (http://tech.slashdot.org/story/09/08/05/2348219/HTML-5-Canvas-Experiment-Hints-At-Things-To-Come?art_pos=8) that made Slashdot earlier today? The site in question hits Twitter for a large number of tweets, and I imagine a lot of /.'ers were checking it out earlier. I doubt it helped, at the very least...