Nice video! Since RIA is still relatively new to some of us, these videos help. However, all the videos and tutorials that I have seen on WCF RIA so far only show editing of simple textboxes in a DataGrid or DataForm. Almost all REAL WORLD applications require the use of ComboBoxes or some type of drop down to choose from a list of allowed string options. If you search for this on the web, and there are a LOT of posts, almost everyone runs into a brick wall. Why is this not in any of the tutorials. We can't continue to convince management that Silverlight 4 RIA is the right choice when it is so difficult to implement common scenarios.
Thanks, and please schedule a tutorial/video on the use of ComboBoxes in DataForms.