Okay...so here's the latest:

I called Grizzly, and their tech agreed with me that part of the problem was
likely that the pulleys were not in alignment. I'll try to describe a 3-D
situation with a 1-D mind at best, but essentially the pulley shafts were
parallel to each other, but the arbor pulleys were slightly to the side of
(not directly over) the motor pulleys. Graphically, I had this situation:

|
| |
| |
|

instead of this:

| |
| |
| |

By loosening the motor mounts and sliding the motor, I got that fixed.
However, the tech also warned me to check for a bad belt, and sure enough
one of them was. That right there basically cured most of the problem. I
cut that one off, and now I'll either get a new one from Grizz or cut the
other two off and go with links.

I'm pretty much convinced the saw wasn't damaged in the spill, and I think
the saw is now within reasonable tolerances. The tech agreed that, since
the motor didn't take the hit, the spill probably didn't do any damage. He
said I could probably see it if it did, and I've been over it pretty well
and not found anything.

Thanks to everyone for their great suggestions.