In fact, Obama's Web site never went down in the six months prior to the Nov. 4 election, according to Web site-monitoring company Pingdom. "His technical staff has obviously done a good job running his website," Pingdom said in a

McCain's site did pretty well too, managing to be up 99.96 percent of the time. But it was offline for nearly two hours in total -- never for more than 25 minutes at a stretch -- during the six-month period.

McCain's site used Microsoft's Internet Information Server software; Obama's used something called PWS, which PingDom believes is custom software designed by the site's hosting provider, Panther Express.

Web site uptime was big news in the 2006 midterm U.S. elections.

Two years ago, representatives from U.S. Senator Joseph Lieberman's re-election campaign claimed that supporters of his main rival, Ned Lamont, had knocked Lieberman's site offline. Earlier this year a federal investigation blamed Lieberman's own campaign for the crash.