It’s unlikely he would be in a position to know, but departing New York governor David Paterson is convinced Michael Bloomberg is still thinking about running for president:

Gov. Paterson isn’t backing away from his belief that Mayor Bloomberg is keeping his options open about run for the White House in 2012, reports our Glenn Blain . . .
Paterson told WOR’s John Gambling this morning that Bloomberg’s big speech at the Brooklyn Navy Yard yesterday was just the sort of thing a wannabe presidential candidate/mayor should be doing to prepare the ground for a presidential campaign.
“He can’t say, ‘I’m thinking about it,’ because once he says he’s considering it, he gets treated like a candidate — he can’t govern as mayor,” Paterson said during his weekly spot with Gambling.”So what I think you do is you say, ‘I’m not interested,’ but you say all the right things,” the governor continued.

I suspect speeches by Mayor and Potential Presidential Candidate Mike Bloomberg get a lot more national attention than speeches by Just The Mayor Mike Bloomberg.