The Microsoft® SharePoint® 2010 Administration Toolkit contains functionality to help administer and manage Microsoft® SharePoint® Foundation 2010 and Microsoft® SharePoint® Server 2010. To be specific I am very excited for these two features:

• Load Testing Toolkit (LTK), which generates a Visual Studio Team System 2008 (VSTS) load test based on Windows SharePoint Services 3.0 and Microsoft Office SharePoint Server 2007 IIS logs. The VSTS load test can be used to generate synthetic load against SharePoint Foundation 2010 or SharePoint Server 2010 as part of a capacity planning exercise or a pre-upgrade stress test.
• User Profile Replication Engine 2010 (UPRE2010), which provides a shared services administrator the ability to replicate user profiles and social data between shared services providers (SSP) in Office SharePoint Server 2007 and User Profile service applications in SharePoint Server 2010. This Windows PowerShell-based tool is not supported for SharePoint Foundation 2010.

Administration Toolkit can be downloaded here .