http://www.salon.com/books/review/2008/02/12/gaming_vote/index.html
The end result of that, though, is that it says that what seems like the best form of voting available is the same one that the Olympics and Hot or Not use - Range Voting. Read the very, very, very thorough website on it here:
http://rangevoting.org/
I haven't read enough to be confident that it's correct, but the article and site are interesting regardless.