I got shown it by a friend that's on here (curse them), was just glancing through the tech section and spotted a couple of questions I could answer, so signed up and answered them!
Not sure about first question, it was probably a joke though, almost all my posted questions have been.
I think i was looking for the origin of a phrase or saying when I found AB, and it was funny reading all the conversations; I've been fairly hooked ever since and like to have a look quite often, tho don't post much - don't like to butt in!! (just like in real life!!)