Cricket's sure making some leaps and bounds, isn't it? That's right, Leap Wireless -- the prepaid provider's parent -- announced that it's making preparations to jump into the world of LTE. The carrier will begin testing the service in Tucson by the end of this year, and aims to blanket two-thirds of its current network (nearly 25 million people) with 4G goodness within the next two to three years. You won't have to wait that long to get your hands on an LTE-capable smartphone, however, as the first ones will begin showing up in the carrier's lineup by the second half of 2012. We knew the company had aspirations for the echelon of 4G when it signed a