Thanks Anita, but I didn't do anything special. There was no choice because the alternative was just unacceptable. If it had gotten out on the road again (which it briefly did when I tried to catch it), it would likely have been history. If it stayed in the median grass, it would have probably gone unnoticed by anyone else and death would have come slowly. The thought of buzzards fighting for a piece before she was even dead makes me shudder.
Thanks WormGod, and I am actually pretty optimistic about the chances for adoption. If it loses the leg, which is likely, in addition to being very cute, it will also be a very unique kitten that should get a lot of sympathy from people. I grew up with a few cats and I want to keep it... I really, really, REALLY do... but I just can't. I will take responsibility for it until recovery is complete though, get it the shots it needs, etc. I'll find a good home for her.
Surgery is probably going to be tomorrow. Until now she has only been under light sedation and they didn't want to try anything too quickly until its condition was more stable. If the leg goes, I'll hate that it had to be that way, but in reality three-legged dogs and cats get around amazingly well.
Edit: Oops, just noticed Jonnie and Joe's comments after I posted this. Thanks guys, but like I said above, there really was nothing else I could do.