Well, for an update, I've been feeling about the same, no better or no worse. I'm resting, icing, blah blah blah. Not much pain, but it's hard to go up and down the stairs. Bearing weight while the knee is bent, or bending it, causes pain.
I wake up this morning and decide I'm probably screwed, since it's been 4 days and no improvement, and I think tendons are kind of slow to heal. Since I'm here at home and NOT skiing, I took the kids to church.
After I got home from church, my knee felt markedly better.

I think I'll try to go tomorrow and the next day, as well. ;)
But seriously, I still plan on calling the doctor tomorrow (if he's open?), unless I'm totally better. I can go up the stairs just fine now, and going down is much easier. I still have to do a funny little hop, though.