Google Co-op allows you to create customized search engines to fit your search interests. .NET developers, you may want to give the following pre-customized search engines a try:
For me, Co-op is a good idea but for now I will stick with just regular Google, at least for .NET related searches. I gave SearchDotNet.com a try and was initially underwhelmed my the number of matches. For example, searching for “EntryAssembly” using the DotNetSearch engine above yielded two pages of matches. Regular Google returns 387 pages.