The Obama is a Muslim smear and the stupid whitey video rumors aren't the last nasty dishonest rant to test our press corps's willingness to publish anything.
A few months ago I noticed claims being circulated by a fellow named Larry Sinclair making allegations that Obama had sex and used drugs with him in 1999. Whitehouse.com offered $100,000 if Sinclair could pass a polygraph test; Sinclair took the test, and failed. Now Sinclair has gotten himself booked at the National Press Club, which is a venue that books press events, as well as weddings and bar mitzvahs, so as to have a sheen of legitimacy.
His stuff has been circulated on youtube and on various websites, but with clear debunkings of his claims and his credibility. Hopefully journalists will continue to ignore this person (though there has been a little coverage), and whoever is fronting him will stop and eventually he can get the medical help he needs. It's just another attempt at pushing the 'whitey'-style rumor, which has gotten attention in the press.
Expect more from the Republicans and the press corps. They want to see this stuff drive politics.