Well, he's put himself forward, so what do we make of it?
Personally, I think it looks like a bit of a publicity stunt for the Conservatives, thinking if they put someone forward who people seem to enough laughing at they might beat Livingstone. While I do get a laugh out of Boris (who doesn't besides Liverpool, Jamie Oliver, Portsmouth and Papua New Guinea), if he can't keep order on a topical quiz show, I can't begin to imagine the chaos that would envelope London with him charge.
Still, at least we know he'll tackle the issues that matter. Ah-ha-ha. Yeah, I'll shut up now.