Gakuen Heaven 2 galleries
This is pretty much complete for the moment, unless more artwork is released. Well, except for some SD illustrations which I need to find, or maybe scan... hmm.
These scans are from various issues of B's Log and Cool-B. Many of the illustrations were created for magazine-exclusive short stories, and you can find most of them in the GH2 translations section!
comiket items, etc
A collection of 'official' doujinshi items, most from Comiket.
Various other scans, mostly from merchandise like postcards and booklets.