Arrived Monday, ~$150 off of Ebay inclusive of Fed-Ex shipping charges. Arrived within a week. I have three West-German Zeiss 50mm F1.5 Sonnar T's, all perfect glass. I had one shimmed for Nikon S-Mount, decided to Zero that one for the new adapter optimized for wide-open use on the M9. A Second one is optimized for the M Monochrom and deep-yellow/Orange filter. The new adapter uses an "index-cam" to correct for the difference between Zeiss and Leica, to keep good agreement across the full focus range. This assumes a specific focal length for the lens, and there is always going to be some deviation from lens to lens. I have this one good for 0.7m to infinity at F1.5.
Test of new Amedeo Adapter by fiftyonepointsix, on Flickr