AFT volunteer organizer?
This is the appeal that I am thinking of responding to:
Volunteer Organizers Needed for 2008 Back-to-School Organizing Campaign
—John L. Lewis
From July 28 to August 30, in school districts from New Orleans to St. Louis, and from Austin, Texas, to Taos, N.M., volunteer organizers are needed to help our union reach out to teachers and support staff in the 2008 Back-to-School Organizing Campaign.
AFT locals in the South face a tough anti-union environment, hostile labor laws, and stiff competition from administrator-dominated, anti-collective bargaining organizations. The AFT is a voice for teachers and PSRPs as they fight for strong public schools, adequate resources and fair compensation.
This is your chance to make a real difference in a place where our colleagues need the help. As a volunteer organizer, you will be on the front lines, talking with potential members, explaining the values and vision of the union, and starting to build the relationship between potential members and the union.
You’ll receive comprehensive, high-quality training on basic organizing skills. For the more experienced volunteer organizers, this will be just a refresher course, but we will ensure that no one is sent out unprepared for the task at hand.

The problems for teachers’ unions aren’t limited to the South:
http://wsws.org/articles/2008/jul2008/detr-j08.shtml
While not the most reliable source, the picture is not radically different for NYC.