Outstanding! I love seeing DIY projects like this. Have you considered doing an open-source license of some sort for this project? Its great that you guys are doing this for non-profit but it would be good to see you gentleman get some sort of extended recognition for all your work. I'll be keeping an eye on this as I want one myself!
I saw how long ago this whole thing started and at first I had lost hope that I might be able to get my hands on one, but it looks like I might get a chance!