Have you thought about doing some getting started videos for new users. Dev Express do some very nice ones that help you understand their terminology as well as how to use their controls.
Because as a person new to wpf and your controls the thing I’m finding the hardest is understanding the point you are trying to make in your documentation!
Some diagrams of your datagrid with arrows linking the bit you are talking about with your term for it would also be very very helpful.
Also walkthroughs of your samples, why you have done what you have done in the sample, not just a here have this approach.
rant over,
martin
