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!"
But ATT has the answer to all their problems in their hands! FemtoCells! All they have to do is make them super cheap, without service cost and open. Say, $50 with a 2 year contract extension. I would buy one in a heartbeat. Hell, I'd probably by 3 and put them at my relatives' houses where coverage sucks. If that helps everyone else who visits them or lives nearby, then even better! All that many more happier ATT customers.
I think most people leave a service provider if the coverage is poor in the areas they frequent. If you have the option of improving your coverage, I think most people would take that instead of breaking contract and moving carriers.