Was it Blekko, or was it some other search engine, that had scraped Adsense publisher IDs from many, many sites and had provided a link entitled "adsense" just to the right of the page title on its SERPs? I seem to recall that it was Blekko. If so, it looks as though they've discontinued that. Perhaps they're offering this information for a fee now. Or perhaps Google strong-armed them into stopping. Does anyone know?

I'm asking because I was, shall we say, "upset" to discover that anyone could so easily connect my disparate sites to a common account and hence connect them all to me. Of course, in retrospect I should have established different Adsense accounts for different types of sites by setting up different legal entities -- but that's water under the bridge.