SharePoint Product team has announced today that SharePoint 2010 has reached the technical preview engineering milestone. Read the blog post - Announcing SharePoint 2010 Technical Preview for details.
On Microsoft.com website a set of “sneak peek” SharePoint 2010 features and videos has been posted, which you will find at SharePoint 2010 homepage. You can now look through short videos (Overview, IT Pro, Developer), Getting Ready Guidance & a set of Frequently Asked Questions.
Links to some content available:
For a comprehensive list of readiness resources and the right steps to take today, check out the SharePoint 2010 Get Ready section.
Additionally, I strongly encourage you to attend the SharePoint Conference 2009 in Las Vegas in October. This will be the key event for the SharePoint Server 2010 release. More information is available at http://www.mssharepointconference.com.