Here you can find the great amount of useful literature about Microsoft SQL Server (available online).

Microsoft SQL Server site

Microsoft seminars

Microsoft Personal Support Page for SQL Server

MSDN Developer Center for SQL Server

Microsoft TechNet

Microsoft TerraServer

Many interesting articles available online, SQL scripts, FAQ, etc.

SQL Server Magazine (many interesting articles available online)

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

Articles, tips, books, user groups

WorldWide SQL Server User's Group

SQL Server News

Michael R. Hotek's site contains technical articles, T-SQL scripts, collection of SQL Server books and product reviews

Code samples, downloads

Downloads, FAQ, discussions

There are FAQs

Transaction Processing Performance Council

experts-exchange (ask a question about SQL Server, and many experts will provide an answer)

Site about SQL Server performance and optimization

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