Two new SharePoint 2007 resource centers are available on Technet

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