Leon just posted a new tool he developed called "TFS Permission Manager" for managing Team Foundation Server permissions in an easier fashion. Way to go!

Here are some benefits in the tool:

"Using this tool you can:

• Add or remove TFS group membership, Reporting Services role membership and SharePoint role membership
• Set Server and Project-level permissions
• Set AreaPath and Source Control permissions
• Create new TFS users with permissions identical to those of specified existing user
• Save user permissions as template and use it later to create new or update existing users. "