To understand what makes the cell phone such a uniquely powerful tool for community organizing and activism, consider three facts about text messaging: it is almost completely spam-free, it's personal, and nearly every message gets read. Websites, e-mail, paper mail and phone calls don't come anywhere near achieving this trifecta.
"It's as close to reaching everyone as anything--here and everywhere else in the world," says Jed Alpert, co-founder and CEO of Mobile Commons. Alpert, 48, is a leading voice in the growing field of mobile activism: using cell-phone technology--mostly text messaging--to dispense information, raise money and advocate for political and social...