I guess this will be blogged extensively the coming hours and days: Microsoft has released official documentation about the next version of SharePoint.
Read all about it here:
SharePoint 2010 enables organizations to connect and empower people through an integrated set of rich features. Get a sneak peek of SharePoint 2010 product features today.
For IT professionals, SharePoint 2010 offers enhancement to drive productivity, scalable unified infrastructure, and flexible deployment. Learn more about how to cut IT costs with SharePoint 2010.
For developers, SharePoint 2010 provides the business collaboration platform to rapidly build solutions and respond to business needs. Check out SharePoint 2010 features sneak peek for developers.