I have updated the Silverlight Globalization Namespace Comparison document that I wrote a while back for Silverlight 3. The document compares all of the classes (and their properties and methods) in the System.Globalization of the .NET Framework with the same namespace in Silverlight. The update, however, is disappointing because there have been no changes in this area so the answers for Silverlight 3 are the same as for Silverlight 2.