Is there a way of searching on more than one of the stackoverflow sites. I asked a question on SU and was pointed to an answer on SO. I had tried looking on Superuser first!
This link lets you search all of the StackOverflow sites:
Since good search is hard, it'd probably be better for you to consult the "experts" when searching. It's very easy to search StackOverflow or SuperUser specifically via Google using the following format in the search textbox:
The only bummer (I just found out) is that you can only search one site at a time. On the other hand, as Jon B said, each site really offers different types of questions, so you shouldn't get too many overlapping hits from one site to another (unless your search is too broad).