Google launched custom search engines today. You can customize the search engine in a variety of ways, but the primary control is selecting which sites to include in the search engine. I've been working on a Python search engine that has technical and community sites for Python programmers. If search for socket, the top results is Andrew Kuchling's Socket Programming HOWTO, which is result five on a regular Google search.
Please give it a try. If you find it helpful, you can volunteer to help maintain it.