WPF is all about the user experience. I'm developing a line of business application and need some working examples of a beautiful data entry form.
I'm planning on using a DataGrid and a modal window to add, view and edit records.
Here's an example of a great looking solution for Silverlight, but it's using a Popup control and not a modal window.
(Silverlight example is near bottom of this web page)
Click here for example of great looking data entry form for Silverlight