StackOverflow is a help when you don't find the answer with Google. It's not really new: it's more a successor to Usenet which is getting quite dated -- especially since most of the old folks have abandoned it.
That's a bit silly, it's structurally unlike usenet. It's advantage is that due to its structure it has the S/N that usenet once did, which is much to its credit since usenet collapsed under the explosive growth of the internet yet stackoverflow appears to just get stronger with growth.
