Microsoft SQL Server site

SQL Server Content Index (find your way to specific pages about SQL Server by using this index) (link)

Microsoft Personal Support Page for SQL Server (link)

SQL Server White Papers

MSDN Developer Center for SQL Server

Microsoft TechNet

SQL Server 7.0 Service Pack 3

peer-to-peer newsgroups to talk about SQL Server with other administrators, developers and MVPs

Articles, SQL scripts, FAQ, downloads

SQL Server Magazine

There are FAQs

Site about SQL Server performance and optimization

Pinnacle Publishing (many articles available online, job forums, etc.)

WorldWide SQL Server User's Group

SQL Server News

Michael R. Hotek's site (articles, SQL scripts, FAQ, etc.)

Downloads, FAQ, discussions

experts-exchange (here you can ask a question about SQL Server)

Microsoft TerraServer

Transaction Processing Performance Council