A friend of mine, came across some info about web beacons on Yahoo, used to track your movements through Yahoo! properties. I don’t think this is new … I seem to recall something about this cropping up a year ago or so. Still, it’s good to be reminded of it every now and then. Chad’s weblog entry is here and it includes links to the Yahoo! Privacy Center with information about their use of beacons and also this link that you can use to opt out.