Yeah, it's everywhere. Hasn't helped with housing prices any, though. I currently live in Somerville and I do love it (it's weird enough for me), but I wouldn't mind living closer to everything.
I'm also a Somervillian. And I will add that Somerville actually has a significantly higher population density than Boston. We are undeniably a part of the urban core, deeply integrated into the city. In a discussion about suburbs vs cities, we fall squarely into the city side, which is one reason I like it here.
Totally. Still about half an hour into Bston, though, which is kind of a drag. (I work at Localytics, and we're at 101 Arch--directly above Downtown Crossing. Not a terrible commute by any means, but closer's still better.)