If you want to get HD in your handheld, NVIDIA's Tegra processor is the hot way to do it at the moment, and we've got reasonably concrete sounding rumors from disparate sources that a handset containing one one of the chips is currently under development by a "top five" smartphone builder (we're guessing it's not Apple), and that it'll be out sometime before the end of the year, selling at T-Mobile and AT&T for just $199. The details of the device beyond that are scant, with Android being a possibility but Windows Mobile looking more likely, and a
