Well, we got the mouse. I had worked late and was driving home at 9:00pm when Kat called me up in a panic saying the mouse was poking its nose under the basement door, trying to get into the kitchen. I was very uncomfortable with getting a traditional snap trap or glue trap, so I sprung $20 for a battery-operated mouse-zapper on the way home. It's pretty cool, actually. It takes 4 batteries and you just open the top and smear peanut butter (not included) on the far wall. The mouse smells it, crawls through a little tunnel and when its feet touch the two metal pads on the floor, it completes a circuit and dies instantly. Then, Ghostbusters-like, the light on top flashes to let you know the trap is full. I set it up that night and the next morning I was shocked to see the trap was blinking (not as shocked as the mouse, haha). I opened it up and, yup, there was an adorable little corpse. I just dumped it into a plastic bag and set it up again, just in case we had more. But it's remained empty and no more sightings, so I think we're good.