Above is Pixar production artist and character sculptor Greg Dykstra. Aside from the fact that he gets to work at the best animation studio on the planet, what is just so special about Greg? Well, if the internet's a-buzzin's have any credibility, he may be so special because he forgot to strip his wall of confidential material when a cameraman walked into his room.
The image above is a screenshot (at around 4:07) of the Up B-roll #1, where you can clearly see some conceptual art of a boy and his (or maybe not his) dinosaur hanging up on the wall right behind Mr. Dykstra.
So what is this mysterious collection of pages? A future Pixar film? Maybe Toy Story 3's short film concept? A separate project that Greg is working on? I reckon that the dinosaur-related Pixar project will be attached to either Toy Story 3 or Cars 2 as a short; Pixar seems like they'd be able to do a very simple yet compelling short about a boy and his dinosaur (but what subject could they not do that with?). But there is no way of truly knowing unless Greg spills his guts as to what he's wallpaperin' his office with.
Update: Perhaps Dykstra may have already given himself away. Thanks to Mike over at the Pixar Blog and his excellent sleuthing skills, he has discovered that Dykstra (whose apparent passion is paleontology), as well as other Pixarians have recently gone on a trip to the badlands of South Dakota last month.
This leads me to believe that this was a research trip for an upcoming Pixar short (as I had previously thought) which might just be directed by the little-known-before-this Greg Dykstra.