The Strobist entry is here: DIY Ring Flash Tutorial.
If you've already seen it, you understand why I feel like I HAVE to make one, versus shelling out a pretty penny buying something like the Orbis Ring Flash. If I wanted to be extremely cheap, I could possibly make a paper ringflash (via diyphotography.net), but I'm not sure how long that would last.
Hmmm. I don't have access to those exact tools so I wonder how I'd make one for myself, but time will tell (if I ever get started on it that is).
That's it. Just wanted to share. :)