Just what the title says. I've got a 96 sable G, and last night I hit a fairly large pothole at ~60MPH because it was unavoidable. Afterwards at low speeds in either fwd gears or reverse, I can hear a grinding sound that seems to correlate to wheel rotation...it sounds almost like plastic dragging on cement. I checked under the car, and there's nothing visible broken or hanging, the strut mounts all feel alright. I'm figuring on the worst here, but I don't know. Anyone have any ideas?

sounds like you broke a wheel bearing. Should be an easy fix, just replace the hub assembly (less than $100) on the side where the noise is coming from. Theres just 3 or 4 bolts and it comes off once you have removed the tire. brake caliper, and rotor (if on the front).

If it were me, before I would start guessing, I would lift each wheel, starting with the suspect and rotate to see what I hear. If you have to investigate further, take the wheel off and get a closer look.