http://usgovinfo.about.com/od/thepoliticalsystem/a/electiontie.htm
And this:
http://abcnews.go.com/Politics/Vote2008/Story?id=5386278&page=2
"If the election is kicked to the House, Obama or McCain would have to control a majority of the 50 state delegations to win the White House. The newly elected and re-elected House members would vote in any doomsday scenario..."