First of all, I figured out how to get GtkRadient for OS X to load .ase models; I have to store them in .q3a/baseq3/models/ (or something like that). It's a pain, but it works.
But some questions: Can .ase models be rotated? If so, how? Can they be scaled? If so, how? Besides moving them around, are there other ways one can manipulate them? If they can't be rotated, does that mean I'd have to make a separate .ase model for each direction a lamp faces, for instance?
How do .ase models behave if they're partially overlapped by brushes?
If nothing else, I can see the potential for making huge landscapes with .ases.