Cross your fingers--let's hope this sucker opens for you when you click on it. If not, admire it from afar. So basically, I took the low-res photo of the new Beipiaosaurus specimen and blew it up in Corel, then used my awesome new Wacom to outline the bones (as best I could) and point viewers to the awesome quills (blue) and throat pouch (red). Really beautiful fossil, but I wish I had a higher-res image! Actually, here's a question for you Photoshop/Corel experts out there: Is there a way to save the image without the canvas? I think that would make the resulting image a whole lot easier to see.
Editz: Yes, question from the back. Sean asks how much stock I put into the idea that the quills on Beipiaosaurus are homologous with those of Psittacosaurus. Honestly? Not a whole lot at this time. The quills are similar in that they're hollow, essentially tubular structures. However, the quills of Psittacosaurus are longer, thicker, and more flexible. They are also preserved only on the tail, although the fossil's uneven state of preservation might account for that. Here's what would convince me: a basal tetanurine theropod with feathers or better yet, a coelophysoid theropod with feathers. But then you'd ALSO need a basal ornithischian with feathers. Count thyreophorans out--I think they're covered (HA!).
Given the composition of most dinosaur skin impressions, I'd guess that feathers are NOT plesiomorphic for Dinosauria. These are animals with scaley skin and, oftentimes, armor. Would the feathers erupt from between the scales? I doubt it. Right now, I think it's safer to say that coelurosaurs developed true feathers, and psittacosaurs did their own thing.