Updates to follow.
Okay, updates, as promised:
I talked to my landlord, and he agreed that we could nurse the kitteh back to health while I try to find it a good home. She's really dehydrated and malnourished, but otherwise seems to be in good health.
E came home at lunch and met her...He's a sucker for whiney cats, and she's whiney to beat all, so she had him wrapped around her little claw immediately.
I figure we'll keep her around for a few weeks and once I get some meat on her, I'll take her to my shelter and run the FeLV/FIV test and give her her first round of FVRCP boosters. Best case scenario is that my in-laws decide that they really do need an outside cat to keep the rabbits out of the garden. Worst case scenario is that I take her to my shelter and she finds a good home there.
No name yet...but we're thinking. :-)