We've just published a video on the DevExpress Channel covering our newest control - the Silverlight Ribbon.
http://tv.devexpress.com/#DXRibbonSLGetStarted
This introductory training video gets you up and running with DXBars for Silverlight. If you've not yet seen the features we expect to ship with our Silverlight Ribbon, please visit:
http://www.devexpress.com/Subscriptions/DXperience/WhatsNew2010v2/index.xml?page=22