Two Resource centers for SharePoint 2007

Performance and Capacity Planning Resource Center for SharePoint Server 2007

This page contains resources to help you with performance and capacity planning for your SharePoint Server deployment—map your solution design to a farm size and set of hardware that supports your business goals.
Organized By:
Planning
Recommendations
Estimate performance based on test results
Demos
Tools from Microsoft
Tools and Papers from Partners and the Community

Best Practices Resource Center for SharePoint Server 2007

To avoid common pitfalls and keep your Office SharePoint Server 2007 environment available and performing well, follow these best practices based on real-world experience from Microsoft Consulting Services and the product team.

It contains best practices for:
Operational Excellence
Team Collaboration Sites
Publishing Portals
Search
My Sites
Developing Custom Applications
Additional Resources