I can fill in a few gaps I think. First off the only thing I know about the Gotha projects is that a year or so ago we ran a production line of 38x8 spun wheels for our Boeing 40 project and the gentleman building the Gotha purchased (at least) four wheels. About the Gee Bee located in the northwest, I might know a little. The fellow who just produced the replice Super Solution (Jim Mosse maybe?) is working on a replice of the Gee Bee QED, the two place variant of the R-1/2 series.
Now more about the status of all the Boeing 40s. There are 4 total Boeing 40s in existance. Two are currently in museums and both are Boeing 40-B2s. This means they were originaly produced in 1927 as Boeing 40-A's, with P&W Wasp engines and then later modified to run P&W Hornet engines aong with some other improvements. One of these airplanes is located in the Henry Ford Museum in Dearborn, MI and the second one is in the Chicago Museum of Science and Industry. The airplane was being sold to the Museum of Flight in Seattle, but the deal fell through. Now the two remaining airplanes are owned both by Addison Pemberton located in Spokane, Wa. One aircraft is a 1928 Boeing 40C, and the other is a Boeing 40-B4. The 40C is currently under complete restoration to flying condition and will (as far as we know) be the oldest flying Boeing aircraft in existance. For more information please visit
www.pembertonandsons.com and click on "Boeing 40C and 40B" then "Construction Photos" for some relatively current project photos.
Mention was also made about replicas being produced for the Museum of Flight. After the deal with the Museum of Science and Industry fell through, the Museum of Flight decided to have two replica aircraft produced. One will be complete and the second airplane will be incomplete, basicaly a semi-complete fuse possible on landing gear. The Museum of Flight already had a replice fuse for a Boeing 40A and along with the incomplete replica they will serve to recreate a late 1920's Boeing production line in the Red Barn. Both of these airplane will be replicas and neither are being built to any form of airworth status.