Yesterday we released our first specification discussing Team Foundation Serve properties and our thoughts on the feature. If you get a chance please go through it and provide us with feedback as it is always important for us to validate our assumptions with customers.
Here are the links:
Directly to the spec: Team Foundation Server Properties
Site that hosts the spec: http://msdn.microsoft.com/en-us/teamsystem/bb936702.aspx
Please email me or post to the forum your feedback.