"Start page" for anyone interested in developing applications on the SharePoint platform: http://www.microsoft.com/click/SharePointDeveloper/
SharePoint Training Tutorials: http://www.fpweb.net/sharepoint-hosting/free-sharepoint-tutorials.asp
Video demos and training for Office SharePoint Server 2007: http://technet.microsoft.com/en-us/library/cc262880.aspx
Online SharePoint Server 2007 Courses: http://office.microsoft.com/en-us/training/CR102146081033.aspx
Microsoft eLearning Site: https://www.microsoftelearning.com/ (search for SharePoint on the site; there is tons of content)
Get SharePoint training on your desktop: http://office.microsoft.com/en-us/sharepointserver/HA102488011033.aspx
Get SharePoint Designer training on your desktop: http://office.microsoft.com/en-us/sharepointdesigner/HA102632321033.aspx?pid=CL100796271033
Technical diagrams and other supplemental documentation: http://technet.microsoft.com/en-us/library/cc263199.aspx
Downloadable content for Office SharePoint Server 2007: http://technet.microsoft.com/en-us/library/cc262788.aspx
Downloadable book: Installation guide for Office SharePoint Server 2007: http://technet.microsoft.com/en-us/library/cc298924.aspx
Downloadable book: Design and build sites for Office SharePoint Server 2007: http://technet.microsoft.com/en-us/library/cc298650.aspx
Downloadable book: Governance guide for Office SharePoint Server: http://technet.microsoft.com/en-us/library/cc718727.aspx
White papers for Office SharePoint Server 2007: http://technet.microsoft.com/en-us/library/cc262733.aspx
Advanced lectures and white papers: http://technet.microsoft.com/en-us/library/cc299032.aspx
Links to on-demand Webcasts: http://www.sharepointblogs.com/uday/archive/2007/04/08/webcasts-for-moss-2007.aspx
SharePoint Server 2007 Help and How-to: http://office.microsoft.com/en-us/sharepointserver/CH100305511033.aspx
SharePoint Server TechCenter on TechNet: http://technet.microsoft.com/en-us/office/sharepointserver/default.aspx
SharePoint Server 2007 Developer Portal on MSDN: http://msdn.microsoft.com/en-us/office/aa905503.aspx
Microsoft SharePoint Team Blog: http://blogs.msdn.com/sharepoint/default.aspx
Best Practices Resource Center for SharePoint Server 2007: http://technet.microsoft.com/en-us/office/sharepointserver/bb736746.aspx
More Free SharePoint online training resources : http://spforsquirrels.blogspot.com/2008/05/free-sharepoint-online-training.html
