So, of course we’d all better hope that Google isn’t actively peering into our raw Google Analytics tracks, although in many ways, as you say, there is no need, as they can turn our Googly trails back on us, and advertise the daylights out of us.

Seems to me that the contextual advertising of AdSense is becoming much more personally honed than “page-honed” if you follow me – so no doubt the algorithms are getting quite honed on us. Which is why I like to jump off and do some completely (ok, largely) random searches and web exploration, to throw the machines off!