I already posted this on G+ and OD&D Discussion, but I figure it can’t hurt to throw it up here too.
I like thinking about the implied setting of the 3 LBBs, so some of the info contained here is also taken from the encounter tables. For example, nixies, pixies, and dryads are not listed under the giant type, so I am assuming that they are not so much faerie creatures as manifestations of natural essence. Also, the dwarf/gnome and goblin/kobold pairings makes me think those creatures are more closely related than other monsters in the same category. Further, the divisions of the giant types into chaos/law makes me think of a unseely/seely court kind of setup.
Some info about terrain is also included (flyer, swimmer, underworld). Based on TU&WA, it seems like purple worms, minotaurs, and medusae only show up underground.