While I'm not sure exactly how online petitions work or how affective they are, I just found this one and thought that if it does actually have an effect with the company, it would be nice to help it out.
Anyways, for those of you who don't know, Geneon USA decided to cut it's Anime distribution on October 1, 2007, which left many series' half finished.
This petition is to get them to finish those series'. And I think that's all it's for. (by the way the page is written that should be all)