In my experience it's fantastic and you get good answers very quickly. I got an answer from precisely the mathematician I was planning on emailing!

It's not meant for homework type questions, though, and they do shut those down right away.

Sorry if we're still appearing hostile. We have a very focused target audience -- people doing mathematical research -- and in order to serve that community best we turn away questions at inappropriate levels (i.e. what should be 'standard material' of a mathematics undergraduate education at a good university). We try to do that politely, and offer suggestions of other places to try, but I know we don't always succeed.

Cool, I wasn't aware of the physics one either. There's a list of them maintained here: http://meta.stackexchange.com/questions/4/list-of-stackexcha...

They're going there. But you know how it is... You can know where the physicists are, or where they're going, but not both at the same time.

I was thinking about creating a ProcrastinationOverflow but I haven't gotten around to it yet.