I have a presentation that I give on SQL Server Consolidation Strategies, and in that presentation I talk about a few links that are useful. Here are some that I’ve found – feel free to comment on more, or if these links go stale:

Consolidation using SQL Server: http://msdn.microsoft.com/en-us/library/ee692366.aspx

SQL Server Consolidation Guidance:  http://msdn.microsoft.com/en-us/library/ee819082.aspx

More references for SQL Server and Hyper-V: http://www.sqlskills.com/BLOGS/KIMBERLY/post/Virtualization-with-SQL-Server.aspx

Quick overview of Virtual Server licensing implications: http://www.microsoft.com/uk/licensing/morethan250/learn/virtualisation.mspx

SQL Server and Hyper-V best practices: http://sqlcat.com/whitepapers/archive/2008/10/03/running-sql-server-2008-in-a-hyper-v-environment-best-practices-and-performance-recommendations.aspx

High-Availability and Hyper-V: http://technet.microsoft.com/en-us/magazine/2008.10.higha.aspx

Virtualization Calculator: http://www.microsoft.com/Windowsserver2008/en/us/hyperv-calculators.aspx

May not be current, but here’s a whitepaper from VMWare for SQL Server: http://www.vmware.com/files/pdf/SQLServerWorkloads.pdf

More information on SQL Server and VMWare: http://blogs.msdn.com/cindygross/archive/2009/10/23/considerations-for-installing-sql-server-on-vmware.aspx

Server Virtualization Validation Program: http://www.windowsservercatalog.com/svvp.aspx?svvppage=svvp.htm