I've seen posts here that were posted in the wrong forum. Today there was one in the IT professionals forum that should be posted under HTML instead, and one with C code in the C++ forum.
What do you think about creating a forum for members to report posts? Besides 'wrong forum' posts, I'm sure you have people posting other 'undesirable' content here (spam, etc). Why not have a way for members to report it, so it gets taken care of quickly?
Not to say that your moderators aren't doing a fine job already, but I have seen this done on another rather large website, and it helped the moderators quite a bit. After all, you can't be everywhere at once, can you?