I have no idea why, but our PR keeps dropping. Our SERPs have continued to go up though and our traffic & unique visitors have gone up tremendously. I know we have tons of links pointing to us in Yahoo (and Google too for that matter) so I can't figure out why our PR keeps going down instead of up. Any theories, speculations, etc as to what PR really means these days. I have stopped paying a whole lot of attention to it because it is depressing.