I've been working on a post about guns, trying to find something interesting in the way gun-rights advocates have responded to the Newtown massacre, but all I really have to show for it is a set of links to good articles by other people. And other people have done that better, so I'll just link to the links here.
Massimo Pigliucci at Rationally Speaking has perhaps the best combination of links and comment that I've seen.
Jean Kazez makes a lot of sense here (although I think I'm closer to being a liberal ideologue than she is--access to deadly weapons pretty much is the whole problem, it seems to me, although no doubt we could do better with mental illness too).
And although it might be too obvious to mention, Brian Leiter has good posts here, here, and here (plus a couple of others that I'll let you find for yourself).