Myself and Adam Gallant delivered an MSDN Deep Dive last week about developing Smart Client applications. I covered the overview & secure data access sections. The samples and IssueVision (1.0 C# & VB) along with the slides are available over here. Thanks to those who came out.
Update: If you want to take advantage of getting this stuff (and more) on the DevDays CD, you can fill in the form here.