Sharepoint 2010 Public Beta is now available! http://www.microsoft.com/2010 

SharePoint Public Beta Resources

General information about SharePoint 2010: http://sharepoint2010.microsoft.com/Pages/default.aspx
Resources for Developers on MSDN: http://www.mssharepointdeveloper.com/
Resources for IT Pros on TechNet: http://www.mssharepointitpro.com/
Have a SharePoint 2010 question? Ask it in the SharePoint 2010 forums