It'd be cool if the font was a bit larger though.
Done.
- What if there are elements on the map that randomly vary?
Most of the special levels aren't that random. As far as I know Hell's Arena is pretty random, so it wouldn't get a map, or maybe it could just get an example of one possible map that could get generated. One other map has random enemy spawns. Aside from that, I think most of the special levels are as random as or less random than the Lava Pits.
I was more worried about whether it would be good to represent how the map changes for each difficulty level (and how to do it elegantly).
Thank you all for the positive responses! I think I'll wait for a few more people to get a chance to comment on this, then start adding maps to the main wiki pages maybe tomorrow or Wednesday.