Tell HN: Searching all stackoverflow sites with Google Custom Search

I just created this custom search which search all three domains at once (stackoverflow, serverfault and stackexchange). There is no question about the quality of the answers on those collection of sites, yet, I fond it annoying that is I have a question about ssh I should look at serverfault, stackoverflow, superuser and unix.stackexchange and perhaps few others to find out if this question has been asked before... http://www.google.com/cse/home?cx=014927534610857777870:6zn_optdtbu