Rabble rouser Al Sharpton has been trying to rally protests, but I am sure different groups have gotten involved in coordinating all the protests across the nation.
Protests have been planned and coordinated from the beginning.
http://www.freerepublic.com/focus/f-bloggers/3193076/posts
http://www.freerepublic.com/focus/f-news/3193242/posts?page=33