Let the hive mind of Engadget get that for you.
"I own an iPhone 3G and I'm looking for a decent speaker / alarm clock for it. I am going to listen music in a mid-sized room, so I want nice quality speakers with solid bass. I also want to use it as an alarm clock, so it would be great if there is such a feature. The price can be low-mid to mid-high range. I was looking at the Klipsch iGroove SXT; it's powerful, slick and the reviews are good, but it doesn't have an alarm clock feature. It's no deal breaker if I can set it up from the iPhone, but I'm not sure. Thanks!"
Though, the net good of having slightly less annoying movie outings will be vastly outweighed by the social net loss of furthering most people's belief that their own actions are not their own responsability. It will lead to scenarios where people say ridiculous things like, "This isn't a restricted zone, therefore I have a right to use my phone/device here and an obligation to excercise that right." Granted, most will say this with their actions rather than verbally- because they will at that point have no vocabulary other that text slang.
This world doesn't need any more removal of presonal responsability.
I think a new system should be implemented where everyone's phones are automatically registered as they enter the theatre (perhaps with a local zone using a similar device). Those whose phones remain silent throughout the film would receive an incentive and reward- perhaps some media clip or movie theme ringtown sent to them via text or an electronic coupon for their next visit- while those who use their phones are charged a reasonable yet unpleasant fee per device-activation offense. Repeat offenders could potentially receive pro-rated ticket prices, be banned completely, or have their individual device singled out and deactivated while on the premesis.
I think this is a masterful plan, and it took me all of 30 seconds to develop.