Morgan Demers has a thorough and well-organized blog covering a variety of topics. Scroll down to the bottom on the right-hand side to select a category. Most relevant are the Lathe Project and Metal Casting. Check out his YouTube channel here.
Makercise Youtube channel featuring Gingery Lathe and Shaper builds.
Terry Brown has a site about "Aluminum casting etc, Lathe & other shed-type things." Note the Foundry pages, and scroll down nearly to the bottom for the Gingery Shaper pages. (42 of them!)
A retired Australian Motor Mechanic with an interest in machining, PGS has been posting videos over the past six months (so far) detailing his progress on the Gingery Milling Machine.
Gingery Metal Shop Series a new playlist at Paul's Garage. He's made some interesting videos on other metal working and DIY topics. He plans to work through the whole series.
My Garage John Schwytzer's page: Workshop, My Charcoal Furnace,
The New Propane Furnace, The First Melt at My New Shop, Foundry Tools, How to Cast Parts, Casting Problems, Lathe, Change Gears, Shaper, Mill, Drill Press, Other Projects, Sundials.
Jason Harris has a page called miBot documenting his Gingery Charcoal Foundry Build, Casting the Base for the Gingery Milling Machine, Calculating Change Gears for Thread Cutting, and Building the HobbyCNC 4 Axis Stepper Driver. Unfortunately, it appears not to have been updated since 2007. (Update: Jason says he bought a mill and built the Gingery Atkinson Engine and Stirling Engine.)
Rick Sparber has a large number of useful articles on his Metal Working pages. Of particular interest are the articles listed under Foundry: My Hartman Electric Furnace, A Simple Controller for an Electric Furnace, Casting and Machining Parts for the Updated Gingery Metal Shaper, Gingery Drill Press, Foundry Procedures, Home Made Crucible and Tongs, Welding a broken Kanthal Heating Element, and A Variable Volumn Flask. The articles under Plastic Injection Molding are about building and using Vince Gingery's Plastic Injection Molding Machine. Machining contains a huge number of articles divided into 14 subtopics. Note A Thrown Together Sheet Metal Finger Brake, which is similar to Dave Gingery's Sheet Metal Brake, and a series of articles about the Gingery Shaper. All articles are in pdf, so you can download them for further reference.
http://www.myheap.com/ Joe Hildreth's project pages. He covers such a wide range of topics, I found his Site Map most helpful.
Jim Builds a Lathe.
Bill's Home-Built Gingery Metal Lathe, and Fun with Molten Metal!
http://sourpuss.net/projects/lathe/ Click on each photo for details on that part of the project. Also note Blacksmithing pages at http://sourpuss.net/projects/forge/
Brian's Metal Casting Project
Not a blog, but forum thread where xlchainsaw describes in great detail his castings for the Gingery lathe, and then how he changed his mind and converted a wood lathe to turn metal.