BoingBoing reader Chris says,
The TXTmob service came into force at the DNC protests, and has really taken off so far this week at the RNC protests, helping organize and coordinate events in real time. Here's a sample of some of the messages that were sent yesterday (there's a full archive on the site, but it requires registration:
15:51:05 Sun, Aug 29 morgan Over 1000 protesters have gathered in Central Park, seems calm at this time.
16:00:30 Sun, Aug 29 morgan Police are not allowing bicycles to ride on the streets in the Times Square area.
16:11:56 Sun, Aug 29 morgan Update: police have closed 6 Ave and all streets west of 6ave from 34 St to 59 St to bicycles
16:14:56 Sun, Aug 29 morgan Kiss-in in progress! 5Ave @ 41 on the steps of the library
16:23:38 Sun, Aug 29 morgan The crowd on the Great lawn of Central Park is growing, police seem calm
16:37:07 Sun, Aug 29 morgan The Kiss-in is marching toward Times Square, and the mouse-bloc actions in that area are begining
Link, and more info on smartmobs blog