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!"
You can continue your call when leaving home.
"Yes. Calls originating inside the AIRAVE coverage area transfer to the Sprint Nationwide Network once you leave the AIRAVE coverage area.
Note: you will be billed at your regular wireless plan rate for the portion of the call that has been transferred to the Sprint Nationwide Network."