Obtaining Public figure status in a libel lawsuit from Internet Forum participation

I’m curious if there are any cases in existence that deal with whether someone who participated in a online chat or Bulletin board obtained public figure status from their participation in that board. A related question would be whether or not discussion of a controversy between individuals on that board would be considered a public controversy (also necessary for finding someone a limited purpose public figure).
Any suggestions?
-Chris

Here’s a case re this issue (pdf file)

SUPERIOR COURT OF THE STATE OF CALIFORNIA CONTRA COSTA COUNTY
AMPEX CORPORATION, EDWARD J. BRAMSON, Plaintiff,
v.
J. DOE 1, AKA “EXAMPEX” ON
YAHOO!, ET AL Defendants. Case No. C01-03627

Just as an FYI as to the legal test of what constitutes “public figure status”