I've been wanting to build one too. I already started on the prep work. Basically building myself some saw horses and other basics so I can be more setup right to build something. I will probably also make a jig of sorts for my mitre saw to make it easier to cut long lengths of wood consistently. Basically just a platform with a stop that slides that can be clamped.
I wanted to do this in summer but it was just too hot working in the garage, no AC. Now that it's slightly above freezing it's perfect temp to be working. Just need to wait till next time I get a few stretch of days off.
This is my desk plan:
I was unable to find some untreated 4x4's so I'll probably only use 2x4's for the legs. I only wanted 4x4's for the look and not strength, since the 2x4's will be fine. I may also add a second thickness of plywood where the plugs are, just to raise them a little so stuff (like a paperclip) does not gravitate to them. They will be tamper proof plugs, and I'll get covers for the unused ones. They'll probably be split up between UPS and non UPS protected.
My goal in this desk is that it is a simple big work surface with room to work on misc stuff like another computer, soldering, and other projects. Most desks are really constrained in space or are too complicated for nothing. I just want a nice big surface. The plugs will be nice for quickly plugging something in and out without going under it. The mini shelf at the bottom will be for setting the UPS and other misc devices that way the floor will be easier to vacuum. Everything off the floor.
I'm not sure yet how I want to treat it after but I'm thinking stain and then varnish the top. I'll have to see what kind of products the paint or hardware store has. I will have to build it in sections, bring it in my basement for staining (probably wont cure properly if I do it in the garage as it's not heated) then assemble it in the office.