LH - if you click "About the Sarah Palin Poll" - the first line below the results - there's an interesting bit there about who has multiple voting capabilities, and who has cookies on theirs (as PBS did on this one). Any person can only vote once, pretty much.

It can still be slanted, I agree...but it's not quite as easy. As they say, this poll WILL be referred to in the media, even though it plainly states it is not scientific - and the lead has gone back and forth between the L and the R.