A recent eBay find is a frameset marked "Ron Blanton 1987," and my Internet searches have turned up zilch on this framebuilder. It's quite a nice rig: Reyonlds 531 Professional tubing, good quality lugwork, including the builder's initials/logo built into the seat lug, nicely mitered tubes at the bottom bracket (which is English threaded). Overall weight of frame/fork/headset is a touch over 5 lbs, which for a 23" frame is likely the lightest in my fleet. Unfortunately, the seat tube has a couple of dings, and the right-side chainstay looks like some numbskull squeezed it with some channel locks in order to get more clearance.
If anyone has any info on this builder, let me know.