Excellent .dot site recommended by Tom Preuss. MSD2D is a resource for the Microsoft Exchange, SharePoint, .NET and Security communities. We felt that there were two basic needs in the communities. First, tools that administrators and developers need on a daily basis such as sample code, administration tips, discussion rooms with mentors, and more. We try to keep these resources easy to find and fun to use. Second, Microsoft customers want to take full advantage of their large investment in server products. Therefore, we put together a search engine to access all the information available on products and services for these platforms. Listings of add-on products and services are FREE as is access.
http://www.msd2d.com/default_section.aspx?section=dotnet