Wow, my second second Zelazny post of the day.
A friend sent me this link to a kickstarter for the Lords of Gossamer and Shadow Diceless RPG. It's based on the rule system for the Amber Diceless RPG and designed by one of the writers for Shadow Knight.
My impression after reading the blurb and the preview PDF is that this is very much ADRPG with the Amber-specific terminology stripped out.
The setting is a clearly an analogue for Amber, with one to one correspondences for the elements in the original, and the impression I get is that it's as close as they could get without using the specific terms.
I'm not sold on the need for the game, since the original RPG is still fairly widely available, but it's a project by fans of Zelazny and Amber. I thought I should at least give bring it to the attention of the folks who read this site and let you make your own decision if it's right for you. I'll probably throw in enough money for the PDF, because hey, Amber fans gotta stick together.