Amtrak Using iPhones to Scan Tickets
"Here's a modern twist on a time-honored tradition for train travelers. Since last fall, Amtrak has been training conductors to use an iOS device to scan passenger tickets on some selected routes, including Boston to Portland, Maine, and San Jose to Sacramento, California."
You can either print out your ticket before hand, or just show the ticket barcode on your iPhone screen so they can scan it. Going paperless, I love it.
iPhone 4, 1.6 GHz Core 2 Duo MacBook Air, Apple TV, 2.66GHz Intel C2D Mac Mini, 1TB TC, Airport Extreme,several iPods and an iPad, 32GB Wi-Fi version. Follow me