http://lawprofessors.typepad.com/media_law_prof_blog/2009/06/anonymous-speech-online.html
student article, includes several cases i'd missed,
Virginia v Janes (spammer case), Doe v Cahill (Smyrna case re discovery subpoenas)
ACLU vb Johnson (indecent re minors on internet).
Miguel E. Larios, The John Marshall Law School, has published "E-Publius Unum: Anonymous Speech Rights Online. 5lariosm at stu.jmls.edu