"If you were lucky enough to have been virally tipped off to TXTmob, it became a don't-leave-home-without-it necessity. Pockets of the city at times resembled mobile-savvy Tokyo, with people staring into handheld devices for direction, instruction, even encouragement. A non-SMS-enabled friend started calling every half hour for updates. On the street, smartphone users appeared to outnumber the 18-year-old anarchists in black.
"TXTmob was developed by activist group Applied Autonomy for the Democratic Convention in Boston. I spoke with 'John Henry' (not his real name), who developed the technology from open source software. 'The whole system runs off an old PC I found in someone's closet,' he told me..."