So Shannon got home, hung out a bit and then went up to take a nap, flushed the toilet and I heard some loud bubbles. I go over to the floor drain in the basement, and it bubbles up a bit more. So instead of messing around, I quickly call the Mr Rooter people and they eventually head over.
A rooter on the main drain, and a snake on the floor drain, and finally we're free flowing again. They're coming back on Monday to do a water high-pressure flush of the kitchen and then the main line out. Hopefully this'll clear up the grease that apparently has bee building up for years and years (before I even moved in...).
*sigh* Oh well...so goes life. I think maybe I stole the gremlin from the Hettinger's, but as far as I'm concerned, they can have it back...