C|NET is running an article about the state of "interactive TV" by way of cellular phones. It sounds like a good idea, but it's hard to imagine a cell phone being more useful for interactive TV than the PC. Most people in US (not on the fringe MobileTracker readers) still don't like SMS or anything that doesn't involve talking on the phone.
"Several U.S. carriers--including AT&T Wireless, Sprint PCS and Cingular Wireless--now offer very simple forms of the much-hyped concept of letting television viewers interact with the shows they watch. For instance, viewers of Fox Network's "American Idol" can cast votes for their favorite performances using cell phone text messages."