OK, so apparently nobody else is noticing another major shakeup. After running another keyword check today on 900 of our most popular phrases (took all day), I see nothing but downward movement. Man, I've barely survived through every singe major algo update, usually a big hit followed by a slow recovery (after doing very little in the way of changes to the site). Google really seems to want all us small guys out. The movement is rarely positive, probably because we're not as well funded and the big scraper houses.
I'm hoping this is another temporary flux. The only "good" news is that I've moved down several tax brackets this year.