Evidently, there are these two guys who, in the midst of the rather manic political climate of the last 11 months or more, created a fake political commentator. His statements have been grabbed by the blogosphere, the NY Times, and other news media, and propagated across the country.
Details are
here. I doubt that it was a turning point for anyone in the political race, but the hoaxes sure didn't hurt Obama any.
EDIT: Try
here for a page not requiring logging onto the NY Times site.