Newsom spokesman Nathan Ballard just confirmed it.
SAN FRANCISCO, CA - February 18, 2009 -- "We are pleased to confirm that Mayor Gavin Newsom and First Lady Jennifer Siebel Newsom are starting a family. The Mayor and the First Lady are thrilled to be embarking on this adventure together, and they appreciate your good wishes."
Why can he write pregnant or with-child? Are they adopting? Confusing. Anyway, we're getting him or her an Easy-Bake Oven.
And congrats, Valleywag, for getting the scoop. (Note to City Insider: Why call it a blog if you don't link to any publications besides your own? Especially since you weren't the first to confirm the story.)