Silverlight Futures Sneak Peek: Building Business Focused Applications

With the launch of Silverlight 2, which offers .NET support, C#, VB, LINQ, multithreading, WCF integration, Data Services Integration, new controls and more, more people are looking into using Silverlight for developing rich business applications.  In the recent PDC 2008, Jamie Cool presented a sneak peek of some of the work being done here to provide more support for building business applications for RIA (Rich Internet Applications):

Hopefully this addresses some of the pain points in building line-of-business Silverlight applications.  What are pain points you've experienced and would like to see addressed?