I am mainly interested in ecological topics of social movement organizations (SMOs), such as founding, disbanding, and merger. I'd rather say that It's relatively theoretical topic than substantial one.
Here I left some links regarding my area:
1. Walker, Edward T. John D. McCarthy and Frank Baumgartner. 2011. “Replacing Members with Managers? Mutualism among Membership and Nonmembership Advocacy Organizations in the United States.” American Journal of Sociology 116:1284-337.
http://www.unc.edu/~fbaum/articles/AJS-2011-membership.pdf
2. Schofer, Evan and Wesley Longhofer. 2011. The Structural Sources of Association. American Journal of Sociology 117(2):539-85.
http://www.jstor.org/stable/pdfplus/10.1086/661593.pdf
or (if you are not an institutional user)
http://www.socsci.uci.edu/~schofer/public_files/SchoferLonghoferStructuralSourcesOfAssociation.pdf
@socspice and Masha(x3), You interested in women's movement? I guess many sociologists study women's movements and this area will be larger and larger, given the the growing proportion of female sociologists.
@socialgroovement, From your id and rainbow flag, I expect you are definitely interested in somo You study LGBT issues and minority movement?
Hope we four see each other at a conference sometime (even though we don't recognize).