Really Targeted Advertising

wiredog points to an LA Times article titled "The TV's Eye Is Set on You." The Times summarizes the story like this: "With cable technology that tracks viewers' habits, two neighbors watching the same show will see different commercials. Practice could begin next spring." The ends actually sounds pretty attractive to me (turn off those embarassing-product ads, please!), but the means (ongoing collection of data about each household) certainly don't.