According to the Wall Street Journal, CBS (and CW) and Disney (ABC, Disney Channel, ABC Family) and considering Apple's (unannounced yet previously rumored) subscription TV service. To throw nebulous fuel on the imaginary fire, the WSJ adds:
The proposed service by the maker of iPhones and iPod music players could, in at least some scenarios, offer access to some TV shows from a selection of major U.S. television networks for a monthly fee, according to people familiar with the discussions. Apple is pushing to complete licensing deals and hopes to introduce the service in 2010, some of those people said. It is unclear whether any networks have signed on yet.