[Occupyresearch] mapping occupy protests GIS, shp files

I'm working on a US project comparing Tea Party activism to Occupy activism
based on congressional districts. Since the TP ran candidates, it's easy to
track them this way. However, I haven't found a good GIS map of occupy
protests, just various Google maps. Anybody seen a shp file, or similar
raster/vector that I can use to map that onto US House districts?
Thanks

Jeramy Townsley
Sociology/Psychology
Indiana University/Purdue University Indianapolis