Earlier this year we developed an Outlook 2007 add in that consisted in: Custom form regions (with custom icons) Custom menu and menu items on Outlook menu bar Custom context menus Periodically retrieving items from a back-end web service...

The guys at p&p just released the new version of this guidance. I particularly find the scalability orientation and the focus on extending LOB systems (which is my personal favorite use of MOSS). This is the MSDN site for the guidance. If you want...