The well-known politics blog Firedoglake published this article on July 7, about the on-line petition going around among Pennsylvania Democrats, that the Pennsylvania Democratic Party support ballot access for minor parties, and especially that Pennsylvania Democrats repudiate challenging their petitions.
You can go directly to the petitions at either site:
http://www.thepetitionsite.com/1/PA-Dems-of-Conscience
http://www.petitiononline.com/pad2010/petition.html