http://msdn.microsoft.com/en-us/magazine/cc163403.aspx

http://www.codeproject.com/KB/office/MyContacts.aspx

http://www.outlookcode.com/news.aspx?id=22

http://msdn.microsoft.com/en-us/library/bb608610.aspx

http://msdn.microsoft.com/en-us/library/bb608615.aspx

http://msdn.microsoft.com/en-us/library/bb772084.aspx
http://social.msdn.microsoft.com/Forums/en-US/vsofficetools2008prerelease/thread/07144243-d59e-448e-a9b9-04ddbf9b58dc

Add a button to context menu
http://social.msdn.microsoft.com/Forums/en-US/vsto/thread/8cb73784-ce61-46e8-9241-25f67bdc5e99
http://social.msdn.microsoft.com/forums/en-US/vsto/thread/74e3fbaf-5806-4684-b410-65a0720386e8/

VSTO FAQ
http://social.msdn.microsoft.com/Forums/en/vsto/thread/31b1ffbf-117b-4e8f-ad38-71614437df59/?ffpr=0

FaceId Property http://www.kebabshopblues.co.uk/2007/01/04/visual-studio-2005-tools-for-office-commandbarbutton-faceid-property/

Very Good Blog http://jake.ginnivan.net/tag/vsto/ 

Build Office-Based Solutions Using WPF, WCF, And LINQ http://msdn.microsoft.com/en-us/magazine/cc163292.aspx
Using WPF With VSTO & Office 2007 http://xamlcoder.com/cs/blogs/joe/archive/2007/07/17/using-wpf-with-vsto-office-2007.aspx

Programmatically Adding a Column to Your Outlook 2007 Inbox Table View http://blogs.msdn.com/bali_msft/archive/2008/11/04/programmatically-add-a-column-in-your-outlook-2007-inbox-table-view.aspx
http://social.msdn.microsoft.com/Forums/en-US/vsto/thread/d695b85f-39c3-4ff7-a528-54c029cdba8e/
http://social.msdn.microsoft.com/forums/en-US/vsto/thread/30ca71bf-b60c-4ed1-85de-0aa739f5ddd1/

Task Panel
http://msdn.microsoft.com/en-us/vbasic/cc338005.aspx
http://msdn.microsoft.com/en-us/library/bb296010.aspx
http://msdn.microsoft.com/en-us/library/bb608590.aspx
http://msdn.microsoft.com/en-us/library/aa942864%28VS.80%29.aspx