Searching for development information is paradoxically getting easier and harder. Easier because there is more data to search. Harder for the same reason.
Though Google is always an option, it may be too broad place to search. So I often look for .NET related info on http://searchdotnet.com/, and probably should use more often the http://pipes.yahoo.com/pipes/ concept.
A cool site that has been re-launched http://blogsearch.google.com/. It's a bless if you're lost on a sea of results. One feature I just love is the published date filtering.