IT Pro Resources
http://sharepoint.microsoft.com/en-us/pages/default.aspx Main Microsoft site (running on SharePoint 2010)
http://sharepoint.microsoft.com/en-us/product/capabilities/Pages/default.aspx Capability overview
http://sharepoint.microsoft.com/en-us/buy/Pages/Editions-Comparison.aspx Edition comparison
Training
http://technet.microsoft.com/en-gb/sharepoint/ff677987.aspx Advanced IT Pro training
IT Professional Overview A video that shows you some of the great new features in SharePoint 2010.
Experiencing the Microsoft SharePoint 2010 User Interface: A video that provides a look at the new, improved user interface in SharePoint 2010.
Getting Started Screencast Series: A series of entry-level screencasts by Microsoft SharePoint MVPs that lets you take advantage of an 11-module e-learning course
http://www.microsoft.com/learning/en/us/training/sharepoint.aspx training and certification
Documentation
http://technet.microsoft.com/en-us/library/ee428287.aspx full TechNet documentation
http://go.microsoft.com/?linkid=9730143 The total economic impact of SharePoint 2010
Downloads
Download trial http://technet.microsoft.com/en-us/evalcenter/ee388573.aspx
VM demonstration images http://go.microsoft.com/?linkid=9728417
Communications
SharePoint Team Blog
SharePoint 2010 Forums
Downloadable Books
Getting started with SharePoint Server 2010
http://go.microsoft.com/fwlink/?LinkId=191146
Planning guide for SharePoint Server 2010
http://go.microsoft.com/fwlink/?LinkId=196150
Upgrading to SharePoint Server 2010
http://go.microsoft.com/fwlink/?LinkId=196221
Deployment guide for SharePoint Server 2010
http://go.microsoft.com/fwlink/?LinkId=196222
Operations guide for SharePoint Server 2010
http://go.microsoft.com/fwlink/?LinkId=196154
Technical reference for SharePoint Server 2010
http://go.microsoft.com/fwlink/?LinkId=196155
Diagrams and white papers
Technical diagrams (SharePoint Server 2010)
Evaluation guide for SharePoint Server 2010 (white paper)
Developer Resources
http://msdn.microsoft.com/en-us/sharepoint/default.aspx SharePoint developer centre
Setting Up the Development Environment for SharePoint 2010 on Windows Vista, Windows 7, and Windows Server 2008
What’s New in SharePoint Foundation 2010
What’s New in SharePoint Server 2010
Get Started Developing on SharePoint 2010
Getting Started with Development for SharePoint Foundation
http://msdn.microsoft.com/en-us/library/ff770300.aspx is the best starting point.
http://msdn.microsoft.com/en-us/sharepoint/ff420377.aspx is excellent free developer training.
http://channel9.msdn.com/learn/courses/SharePoint2010Developer/ channel 9 training
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=83a80a0f-0906-4d7d-98e1-3dd6f58ff059&displaylang=en SharePoint developer training kit download
SharePoint 2010 SDK Documentation. Software development kits (SDKs) or references
SharePoint 2010 Technical Articles. Technical articles are 15-20 pages in length and provide detailed technical information and code examples
SharePoint 2010 Book Excerpts. Book excerpts are online excerpts of published books.-
SharePoint 2010 Visual How-Tos. Visual how-to articles are 10-15 pages in length and combine some of the best elements of blogs, video, and technical articles by providing a brief overview, a code sample, and a how-to video.
SharePoint 2010 Quick Notes. Quick Notes are 2-4 page tasks in a single scenario.
http://msdn.microsoft.com/en-us/library/ee556429.aspx Search connector development
Code Samples
SharePoint Downloads and Samples
SharePoint Code Gallery Projects
SharePoint CodePlex Projects
Community
SharePoint Community
ALM Resource Center | SharePoint 2010
Application Lifecycle Management is the coordination of all aspects of software engineering—including the formulation and communication of business and technical requirements, code design and architecture, project tracking, change management, coding, testing, debugging, and release management—by using tools that facilitate and track collaboration among and within work teams.
http://msdn.microsoft.com/en-us/sharepoint/dd552992.aspx