Brad KlausenFlatstock fans unite! Pearl Jam’s throwing a party for people who’ve shown them some artistic love (in a good way, not in a Creed way). The Ten Club Rock N’ Art Poster Convention–going down at 1 p.m., May 23 at Showbox at the Market, FREE–will feature Pear Jam posters and art from designers who have put pen to paper in the name of PJ. No, there’s not going to be a PJ BAND appearance, but it’s probably a good idea to get an Eddie Vedder rumor started. Although I think he’s rumored to be at three other clubs that day.More art after the jump.Ames Bros.Brad Klausen