An introduction training is available on the Office Beta web site about the new SharePoint 2010 user interface. During the course, you will go have an look at the ribbon, how to work with lists and document libraries and also how to edit and create pages and sites.

The course is free and available here : http://officebeta.microsoft.com/en-us/sharepoint-server-help/overview-RZ101806469.aspx?lc=en-us&section=1