I am currently investigating how to push data from Team Foundation Server to SharePoint.
Are there any connections available out of the box? Any useful online references? Third party tools?
TFS can integrate with SharePoint by installing TFS on the SharePoint server (and installing the extension).
I have used it before and found it very valuable. It allow business users (non-devs) who may not have access to TFS to add work items/bugs etc. and check bug fix rates and do reporting.
This is an MSDN article about integrating TFS and SharePoint: http://msdn.microsoft.com/en-us/library/ms253177.aspx
Here is an MSDN blog article with some extra links: http://social.msdn.microsoft.com/Forums/en-US/tfsadmin/thread/4acefd21-725d-4107-ba9c-bdfa8fe54012/
There is a similar question on the same topic - TFS Project linking to sharepoint 2010 and I have posted a response that may be helpful. The approach would be to access the internals of TFS via its object model.