Thanks Willy-P. Schaub.
We also have written 2 custom diagnostic data adapter that capture screen shots per click and capture custom logging files(msdn.microsoft.com/.../dd286743.aspx)..
We also written a test manager plug-in for recording action recordings via Google Chrome(currently not supported OOB but we are using the supported APIs in the SDK - msdn.microsoft.com/.../dd380742.aspx).
We'd be really interested in learning about the upgrade process for these types of customizations to Dev11 as well.
The challenge we've had with 2010 is that there are so many nuggets of TFS customization information scattered on softies blogs, in comments on blogs, or in forum posts that it's really difficult to get concrete information without having to directly email individual softies to get usually contradicting information....so if the rangers are working on packing all of these types of things into single places than I'm all in for your efforts and am eager to see the content.