From the SharePoint team blog, the announce of the version 1 relase of the Administration Toolkit for SharePoint 2010.
The toolkit has some new tool for SharePoint farms  administration. Here in details:

• User Profile Replication Engine 2010 (UPRE2010): this tool got a complete overhaul and was converted to PowerShell. It now allows you to replicate Profile and Social data between SharePoint 2010's User Profile Application (UPA), as well as backward compatibility with SharePoint 2007's SSP. You can replicate between SSP's or UPA services, as well as across versions. (Note that only Profile data can be replicated across versions, as SSP contains no Social activity tracking).
• The Security Configuration (SCW) Manifest: SCW is an attack surface reduction feature in Windows Server. This manifest adds roles for SharePoint 2010 Products to Windows Server 2008 with SP2 or Windows Server 2008 R2.
• The Content Management Interoperability Services (CMIS) Connector: enables SharePoint users to interact with content stored in any repository that has implemented the CMIS standard, as well as making SharePoint 2010 content available to any application that has implemented the CMIS standard.
• The Load Testing Kit (LTK): LTK generates a Visual Studio Team System 2008 (VSTS) load test based on Windows SharePoint Services 3.0 IIS logs. The VSTS load test can be used to generate synthetic load against Microsoft SharePoint Foundation 2010 as part of a capacity planning exercise or a pre-upgrade stress test.

To download it, please follow this address:
http://www.microsoft.com/downloads/details.aspx?FamilyId=718447d8-0814-427a-81c3-c9c3d84c456e&displaylang=en

And here, for the documentation:
- SharePoint Foundation 2010: http://technet.microsoft.com/en-us/library/cc508986.aspx
- SharePoint Server 2010: http://technet.microsoft.com/en-us/library/cc508851.aspx

Happy download !