Free SharePoint 2007 Book
TechEd 2006 was a SharePoint frenzy this year, drat my luck in not being able to fit it into the schedule. The good news is that many of the resources will be available even if you couldn't make it, and there are sites like Virtual TechEd and Bil Simser's June blog archive to help you live the experience without a plane ticket.
There was also the release of a new SharePoint book with the not-so-succint (or descriptive) title:
7 Development Projects for Microsoft Office SharePoint Server 2007 and Windows SharePoint Services 3.0. Printed copies were free at TechEd and it's also available as a free download.
Anyone at all interested in SharePoint will want to peruse Chapter 2, which outlines and explains features in the new version including Web Content Management, BI features, document management, and enterprise content management.
Future or current SharePoint developers should at least flip through the book to build a picture of how MOSS 2007 fits together and what the concepts are -- changes to the security model, site definitions, site features, Content Types, how Workflow is integrated, Excel Services -- there are a hundred small topics, you owe it to yourself to get a handle on the big picture.
The "7 Development Projects" alluded to in the title are actually case studies found in the introduction. Screen shots there show some pretty cool integration and BI scenarios.