Though I understand this video was downlpayed on the US networks (see Wikipedia article). A full transcript of his speech can be found here and the full correspondents dinner video here.
Maybe Stephen Colbert could be invited to the next White House correspondent's dinner? I think Obama's advisers may suggest otherwise though!
Lastly this Jeremy Paxman inquisition, sorry I mean interview, of Michael Howard, Britain's deputy prime minister is rather funny. Jeremy Paxman is a qualified barrister, and it cetrainly shows! I won't spoil the surprise, but according to Paxman in the story behind that story, the count is 14, however the video below (which conains a shortened version) makes it 12. Unfortunately embedding is disabled by the grumpy old BBC so you'll have to click on the link, or view the one below which contains a shortened version of the interview towards the end: