MnCSE stands for Minnesota Citizens for Science Education.
If you are a Minnesotan, this will of course be of direct interest to you. If you are interested in science education issues (read: defending our children against the onslaught of the Creashunist Foes!!!1!!) then you will find it to be a model example of a state-wide non-profit.
There is also this cool thing on the right side bar that has a picture of something cool, and you click on it, and find out what it is.
The site is here.