To follow up, greasing the heck out of the front end does seem to have loosened up the steering a bit. It still doesn't self-center perfectly, but it's certainly not as bad as it was.

I was going to try stopleak for my tranny leak, but the PS pump is leaking way more ATF than the tranny (although both are leaking!) Guess I'll do both -- reseal the PS pump and try some stopleak in the tranny. I can't park in the driveway right now; it's brick, and my wife gets very mad when my cars drip stuff.