This afternoon, armed with a shovel and a bucket, the hornet nest was knocked out of the ceiling. After cleaning up the remnants of the nest, bugs, and larvae (of which, the cleanup was particularly nasty), I am done. There's still a hole in the ceiling, but I'll patch it tomorrow.
I've dealt with a lot of home-related annoyances, but this was quite possibly the worst. Regardless, it's time to go to bed and read comics until I fall asleep.