anthony not sure if you have seen this yet;
there's a helpdesk app called ZenDesk (no experience with it, sorry), and there is a codeplex project that integrates Zendesk with TFS here:
http://zendesktfsgateway.codeplex.com/
I'd suggest looking at that, it might be just what you are looking for, but I don't know if it's what you were after or not.
Lowell
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