Test your application on SQL Server which might have millions or records. Design your own Data Virtualization algorithms and test them using the codeplex provided databases on SQL Server 2005 and 2008 available at the codeplex website WPF also provides controls for UI Virtualization for DataSets although all the records must be stored in the memory which is an overhead.
Good data virtualization algorithms can save memory exceptions and lead to better performance. Let me know if you need my findings on the same
Just assessed myself on Agile Management at Scrum.org and scored a 73%. Learned a lot through the feedback. I think I can do some certification sorta to help myself get better as a Scrum Master / Product Owner in future.