The simple desk works great, but the one drawback to the open design is there is no place to hide cables. I came up with a simple solution using 2″ PVC pipe.
Take a length of pipe and cut 1.5″ sections using a saw (I used the radial arm saw, but that turned out to be pretty dangerous). Then cut a 3/4″ section out. The final step is to drill and counter sink holes on the opposite side of the cutout.
Next, attach to the underside of the desk and get organized!