If you often find yourself scratching around on the SharePoint TechNet site, you will know the content library is massive; the welcomed release of the technical CHM (Compiled Help Format) makes it really easy to get technical documentation as well - now I can have the SDK and the Technical CHM on my PC for offline. Download it at: http://www.microsoft.com/downloads/details.aspx?FamilyID=ba006584-711d-4ce7-9e1f-181aedf6434a&DisplayLang=en