Great overview with supporting graphics.
Some very detailed notes on how the equations used in ice sheet models originate from basic conservation of mass, energy, and momentum.
Some very introductory level questions about ice sheets and climate.
CISM shares enough in common with Glimmer, that Glimmer's documentation is a good starting point for many things. This wiki is a good resource.
The things that have been added to Glimmer are documented here.