There is a new DF book out - the long-awaited second volume in the Monsters books series that launched with a Kromm/Yours Truly co-written book quite a while back.
The new one is a lot more focused. Instead of a catalog, you get 7 kinds of slimes, spores, mold, and fungus and a staggering amount of potential variations.
You can read more about it here:
GURPS Dungeon Fantasy Monsters 2: Icky Goo
I'll try to get a review up ASAP.