Way, way back in March, I discovered that my book price comparison site, isbn.nu had been dropped from Google. Read that March post for details, but it wasn't nefarious. After months of gradual improvements, they were finally able to spider me like crazy, and as of this morning, I have 90K results (up from 4K yesterday).
As I said at the time, even though I experience a nearly 50 percent drop in revenue from commissions from bookstores because of falling out of Google's index, Google's business model is not to make me money. Rather, my success at being listed and getting sales indirectly was an epiphenomenon of how they index. Still, I'm happy to be back.