Here's his page describing How to Build a Simple Drill-Powered Wood Lathe.
He also points out a really cool book on How to Build Your Own Metal Working Lathe, which is part of an entire series by Dave Gingery that walks you through how to create an entire machine shop from the scratch. An amazing accomplishment. When/if I have a large chunk of time, this is something I would love to to do. I picture casually saying to admirers, "Oh, that milling machine...yeah...I built it from scratch."