Shannon Braun is one of the few developers I know that has lived and breathed WPF in a real-world, enterprise-class project.  He has spent the last year or so working on a WPF app that is really ground breaking and shows a lot of the power that WPF brings to the table in a business context.  I wish I could tell you more about it or where the work is being done, but it's kind of hush-hush.  All I can say is that is is for a large customer based in Minneapolis.  Shannon and I previously talked about some of the things he has learned about doing WPF dev (interview here), and now Shannon follows-up with some nice, practical, real-world advice on dealing with WPF's lack of a data grid control.  Good stuff.