This website is a good example of the Internet being used to organise protests. The website includes user generated maps, video streams and organisers materials.
Other useful background and comment can be found in the Guardian http://www.guardian.co.uk/world/occupy-wall-street
Open Culture has films of S Zizeck and Stiglitz participating in Occupy Wall Street. http://www.openculture.com/2011/10/slavoj_zizek_speaks_at_occupy_wall_street.html and http://www.openculture.com/2011/10/joseph_stiglitz_and_lawrence_lessig_at_occupy_wall_street.html