Desk-building Begins

I'm attempting to document the building of my desk.  It will be an L-shaped desk attached to two adjacent walls in my home office.  One side will be 8' long, and the other side will be about 8' 4" long.  I got the idea from this instructables: http://www.instructables.com/id/Simple-Rock-Solid-Cantilever-Desk/  My design is slightly different, and it will have a bottom shelf.

Here are what the walls look like right now:

The blue tape marks studs and screws.  I got some 2x4's today from Home Depot to build the supports for the desk:

I was amazed at the poor quality of the lumber.  It was difficult to find really straight studs.  And the wood was quite moist.  I'm hoping that the wood won't warp as it dries.

I'm going to attach the ledgers tomorrow.