While waiting for Henry Jenkins forthcoming book (Spreadable Media) on social media as a system which for instance includes Facebook you might want to read these articles in the meantime.
- http://www.henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_1.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_2.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_3.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_4.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_5.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_6.html
- http://henryjenkins.org/2009/02/if_it_doesnt_spread_its_dead_p_7.html
- Or have a look at this slideshare: http://www.slideshare.net/amandafo/ica-af-edits (Read the interesting comment by Fuchs below the slide)