If you want, add glass to the openings and finish off the project by leveling the door on both sides and you're set.
So because I'm apparently an idiot, I thought this project would take just about 2 weeks. 2 months later, I am sick and tired of end grain, but I have what I think is a pretty kick ass door. I made it at Tech Shop (and thank god I had Tech Shop because otherwise, this damn thing would have taken 5 times as long to make) http://Techshop.ws
Step 1: Cut a bunch of 2x4s
Using the miter saw, I cut down about 12, 8' 2x4s. This gave me approximately 4 million 2.5" pieces.