Sharepoint 2010 Upgrading & Customizing the new Sharepoint Ribbon

• Upgrading from Win2003 & Moss to Win 2008 & Sharepoint 2010 (blogwriter has got a sharepoint 2010 beta!) check it out at http://blogs.technet.com/ritaylor/archive/2009/07/17/a-triple-double-upgrade-part-1.aspx
• Slides about "Preparing for Upgrade to SharePoint 2010 Today" by Sharepoint Joel aka joeloleson, nice info about PreUpgradeCheck to run on old Sharepoint server to check for problems
• SharePoint Products and Technologies: 2010 (Technical Preview) Developer Documentation about Customizing the Ribbon in Windows® SharePoint® Services "14" download it here