Have seen plenty of Newsom. He's a bit of a mixed bag. He had this weird playboy image with his coiffed hair and his TV girlfriend despite apparently being a massive workaholic. Might have a case of Clinton syndrome, as he got caught schtupping the wife of his campaign manager. Still don't know whether his big reach on gay marriage (when it was illegal at the time, he ordered the SF city-county clerk to issue marriage licenses to gay couples) was genuine activism or just a clever spot of grandstanding.
He'd planned to run for Governor before it was apparent Brown was going to kick everyone's ass and he went for the Lieutenant Governor's job as well. Personally, I think the Governor's job is a bit of a poison pill right now, and suspect Newsom might have his eyes on a Senate seat once Feinstein or Boxer gives up the ghost.