RIA Services - Documentation Guidance and Community Samples

http://jeffhandley.com/archive/2010/03/30/riaservices-documentation-samples.aspxhttp://jeffhandley.com/archive/2010/03/30/riaservices-documentation-samples.aspx

DEVELOPING WITH WCF RIA SERVICES QUICKLY AND EFFECTIVELY

http://live.visitmix.com/MIX10/Sessions/CL09

MVVM Tutorial

http://www.silverlightshow.net/items/Model-View-ViewModel-in-Silverlight.aspx

Silverlight JukeBox

http://www.codeproject.com/KB/silverlight/SilverlightYouTubeJukeBox.aspx

Leveraging the ASP.NET Membership in Silverlight

Authentication in Silverlight
http://www.silverlightshow.net/items/Leveraging-the-ASP.NET-Membership-in-Silverlight.aspx

Silverlight4 - Excel

http://www.silverlightshow.net/items/An-Excel-file-Viewer-in-Silverlight-4.aspx

Database Tutorial

http://cerig.efpg.inpg.fr/tutoriel/bases-de-donnees/chap01.htm