They just started up their own newsletter. What really caught my interest is Dan Erlewine writes an article in it, like how to turn a truss rod that's stuck, fixing a finish, or other little tips that he's famous for. Check it out, especially if you don't already own his book, Guitar Repair Guide.
Yeah, Dan has been StewMacs leading Editor and Tech Advisor ever since he sold his famous Guitar Hospital in Michigan.
The guy invented most techniques and tools that are used on modern electric guitars as well as some modern tools for acoustic guitars. He's THE guitar tech/luthier. I'll have to check that newsletter out for sure though! Thanks for the link.