As of today, more information about SharePoint 2010 is available at MS Technet. Big thanks goes out to Boris Kepy for the heads-up. Be patient with the SharePoint 2010 site as it is getting a lot of hits and is responding quite slow:
SharePoint 2010 (Beta) Developer Center & Videos
http://msdn.microsoft.com/en-us/sharepoint/ee514561.aspx
http://sharepoint2010.microsoft.com/Pages/videos.aspx
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