One of the great difficulties in researching the intersection of activism and information and communications technologies (computers and the Internet) is that it goes by many different names. Here are just a few: virtual activism, virtual protests, virtual sit-ins, hacktivism, net activism, and cyberactivism. Unlike the hard sciences, so-called soft sciences such as sociology tend not to have standardized subject lists. Resources such as Google can only get you so far. Without the right name, one can miss major categories and examples of activities.
Here is a university graduate course that begins to explore the different characteristics comprising each word.
On the specific word, cyberactivism, students in an undergraduate sociology course at McMaster University have created a nice introduction to cyberactivism . A cyberactivism tutorial from California Polytechnic State University at San Luis Obispo, shows how the Internet can be applied to each step of becoming an activist.