Mobile Boarding Passes - Second Attempt in May 2009

First, there are several people using the mobile boarding pass - all carrying around thick, smartphone-esque devices with large color screens. Walked up to the TSA agent checking ID's. She had a machine. I just waved my cell phone in front of the scanner, and my information popped up on a single, monochrome text line. She cross-referenced with my ID, and I was on my way. Easy.