It's fascinating because they are largely centered around an environmental issue, namely the destruction of a park for the purposes of putting up a mall. It's evolved into being about a lot more than this though and again you have another massive uprising of the people against their repressive government with some incredibly explosive results.
This tumblr is the place to see the whole thing unfold in pictures. Social media as journalism is not overhyped: http://occupygezipics.tumblr.com
WARNING : PICS CONTAIN SCENES OF BLOODY AND INJURED PROTESTERS