For the desk, I got 3/4" maple 7-ply plywood and true cabinetmaker's maple 1x2"s (more on this later). To save on costs, I bought cheaper plywood (13-ply chinese birch) from the same place for the interior pieces (mostly the drawer boxes). I used optimalon's cut optimizer (http://www.optimalon.com/index.htm) to make sure I used wood efficiently. Since I wasn't using traditional dimensional lumber, I bought 200 BF of 1x2" and trimmed it all down to the actual dimensions (3/4"x11 1/12'), then glued the 1x2's together after they have been trimmed on the table saw to get the number of 2x2's I needed.
To save weight and materials, I nixed the full plywood divider, and replaced it with a full frame of 1x2 around the underside of the top assembly. That way, it was easier to install drawer slides later, as well as make adjustments to other portions.
I also put a back on the desk since it wasn't going up against a wall. If you're going to do that, you need to purchase a 3rd sheet of plywood as there won't be enough material with just the two in the list.
This was also my first project with the Kreg Jig, and I loved working with it! I have definitely learned that I need to be more consistent about clamping with screwing together pieces, there are a number of pieces on the desk that don't sit as flush as I would like because I screwed them together without any clamping. Learn from my mistakes!
Speaking of mistakes, you'll notice the top has a sort of cross pattern with 1x2 and plywood panels. That was done because I made a bad cut on the piece meant for the top of the desk. It was a 1/2" too narrow at one end, so I put the 1x2's in as a frame and filled it in with pieces I measured twice and cut once! I wish I had done it right from the beginning, but the end result looks on purpose and I'm happy with it!
I don't know what else to write about the project, but I'd love to answer any questions you may have about the build and the plans from my experience with them!