Build Information - Customizing what is displayed
http://blogs.msdn.com/patcarna/archive/2009/11/17/tfs-2010-customizing-build-information.aspx
http://blogs.msdn.com/patcarna/archive/2009/11/19/tfs-2010-customizing-build-information-part-2.aspx
Build Information - Customizing How it is displayed
http://blogs.msdn.com/jpricket/archive/2009/12/21/tfs-2010-displaying-custom-build-information-in-visual-studio.aspx
http://blogs.msdn.com/jpricket/archive/2009/12/22/tfs2010-changing-the-way-build-information-is-displayed.aspx
Custom Process Parameters
http://blogs.msdn.com/jpricket/archive/2009/12/23/tfs-2010-custom-process-parameters-part-1.aspx
http://blogs.msdn.com/jpricket/archive/2009/12/23/tfs-2010-custom-process-parameters-part-2-metadata.aspx
http://blogs.msdn.com/jpricket/archive/2010/01/18/tfs-2010-custom-process-parameters-part-3-custom-editors.aspx
http://blogs.msdn.com/jpricket/archive/2010/01/18/tfs-2010-custom-process-parameters-part-4-custom-types.aspx
How to create and load add-ins in Visual Studio .NET
http://support.microsoft.com/kb/816167
Writing Custom Activities
http://blogs.msdn.com/aaronhallberg/archive/2009/06/01/writing-custom-activities-for-tfs-build-2010-beta-1.aspx
http://blogs.msdn.com/patcarna/archive/2009/12/04/introduction-to-windows-workflow-4-0.aspx
http://blogs.msdn.com/buckh/archive/2010/01/21/deep-dive-on-windows-workflow-4-0-activities.aspx
http://blogs.msdn.com/patcarna/archive/2010/01/19/windows-workflow-4-0-workflow-instance-extensions.aspx
Building .NET 4.0 Applications Using Team Build 2008
http://blogs.msdn.com/willbar/archive/2009/11/01/building-net-4-0-applications-using-team-build-2008.aspx
Custom Build Process Parameters
http://blogs.msdn.com/jpricket/archive/2010/01/18/tfs-2010-custom-process-parameters-part-3-custom-editors.asPx
WPF Flow Documents
Basics: http://msdn.microsoft.com/en-us/library/aa970909.aspx
http://blogs.msdn.com/jpricket/archive/2009/01/07/wpf-flowdocuments-when-why-how.aspx
http://blogs.msdn.com/jpricket/archive/2009/04/23/collapsiblesection-hiding-paragraphs-until-the-user-wants-to-see-them-in-a-flowdocument.aspx
http://blogs.msdn.com/jpricket/archive/2009/01/07/wpf-documents-indenting-paragraphs.aspx
MISC
http://blogs.msdn.com/jimlamb/archive/2009/11/03/upgrading-tfs-2008-build-definitions-to-tfs-2010.aspx
TFS 2010 Documentation
http://code.msdn.microsoft.com/vsx
http://code.msdn.microsoft.com/TfsSdk
-------Blog Rolls-----------
Load Testing
Team Foundation General
Team System General
Team System Web Access
TFS Build
TFS Migration
TFS Reporting
TFS Setup & Admin/Ops
TFS Version Control
TFS Work Item Tracking