Details at Hot Air.
UPDATE: A reader writes to protest that this group is not a bunch of leftists. I based my judgment on the information and links in the Hot Air post — e.g. their protest at the Republican convention and their targeting of Palin. But I’ll concede that I don’t really know anything about this group, other than that they deserve to be prosecuted for what they did to Palin, and generally seem like the kind of losers one generally associates with anonymity on the Internet.
UPDATE x2: I agree with Michelle Malkin: an appropriate level of outrage should be directed at the jerks who gleefully republished this stuff.