Today the mockuptoxaml open source project officially kicked off. The code and the project is not yet publicly published on Codeplex yet. I am getting the code and the first alpha release of the application ready. It is in its infancy. I will post on my blog the progress of the application until it is officially available on codeplex.
Many thanks to Balsamiq for providing me with a license code free of charge.
So my baseline mockup looks like this:
Version 0.1 of the application :D generates this crude WPF form. As you can see there is a lot of work to do, but it is slowly coming together.

0d220f66-4ed8-4230-8b53-c9b077334f80|1|5.0