Microsoft Enterprise Architecture

Here you'll find technical content, news, and community resources covering enterprise, application, and systems architecture.

Microsoft Application Architecture Guide, 2nd Edition

I highly recommend the Microsoft Application Architecture Guide, 2nd Edition for developing solutions using the Microsoft platform and the .NET Framework.

Microsoft SQL Server Large Data Warehouses

Here are some links to the articles about the performance of SQL Server large data warehouses:
MSDN: The Data Loading Performance Guide
MSDN: We Loaded 1TB in 30 Minutes with SSIS, and So Can You
MSDN: Introduction to New Data Warehouse Scalability Features in SQL Server 2008
and many more Microsoft SQL Server 2008 White Papers and Microsoft SQL Server 2008 R2 White Papers