In Futurama, our characters are thoroughly inundated by advertising, especially subliminal advertising that comes out of your pillow into your dreams.

– Futurama creator Matt Groening, February 1999

How do you persuade TV viewers to watch advertisements when the DVR has accustomed them to skip through them? That’s the dilemma facing television and cable networks today, one that’s so far defied a solution. But perhaps not for much longer.

The Times Online reports that the evil geniuses at Keystream have developed a new overlay advertising system that scans video content for open spaces–an unadorned wall, for instance–and slaps an ad on it, embedding it directly into the programming.

“There’s a lot of potential,” said Simon Fell, head of future technology at ITV, a company that’s testing Keystream’s technology on its ITV Local site. “If there’s a scene in a program where there’s time, then it could give us a chance to get an ad away. But obviously on television you won’t be seeing one of these appearing at a crunch point in a drama.”

Really? In this age of product placement? Ever see the list of brands plugged in the “Sex and The City” movie?

If ITV’s tests prove successful it’s only a matter of time before we begin seeing Garmin GPS ads etched into the beaches of “Lost” or Levitra logos popping up willy-nilly on “Desperate Housewives.”

This morning the video site, which is jointly owned by NBC Universal (GE) and News Corp. (NWS) (which also owns Dow Jones and this site), said it will offer full episodes of “The Daily Show with Jon Stewart” and the “Colbert Report” beginning today. The deal, which brings the popular late-night satirists to the site just in time for the presidential election, is something of a surprise, since Comedy Central parent company Viacom (VIA) has so far refused to sign on to Hulu.

But that may change if this first tentative experiment bears fruit. “I think with success breeds success. It could open some other doors,” said Erik Flannigan, executive vice president of digital media at MTV Networks, the Viacom division that runs Comedy Central. “Hulu in many ways may put the shows in front of some people who might be more casual viewers but who might be interested in what’s going on with the elections.”