This is an event which I originally planned for AmberCon NorthWest 2005, and will be running again (though not necessarily the same) at ACNW 2006. The title is "Princesses in Rebma" -- i.e. a reversal of Zelazny's first Corwin novel, "Nine Princes in Amber". My opening description of it is:
The mysterious underwater city, the inverted image of Amber ruled by a powerful Queen. Long before the Patternfall War, Rebma had its own intrigues and clashes. This is a game of intrigue in the royal court of Rebma, in the heyday of Avalon before Morganthe's elopement. There may be visitors from Avalon or Amber, and Moire, Morganthe, Random, and Llewella are likely to appear (as PCs if chosen, or as NPCs otherwise). The focus will be the subtle intrigues over the future of relations between Amber and Rebma. This will an alternate history which could take events in a different direction than they did in the chronicles.
Character Instructions: I can provide a variety of characters (including choices of the known characters Moire, Morganthe, Llewella, or Random), or you can send me character ideas in advance -- which could include almost any of the Amberites of the time, though a preference is for characters with ties to Rebma. A variety of power levels is possible. Character with less outright power will be balanced by superior position, knowledge, and connections.
There are a few key points which I extrapolate from. Queen Moire slept with Corwin without a thought, and there is no mention of any marriage or kings in Rebma. Further, she apparently considered that marrying Random for a year before he would presumably run off would be a good thing for Vialle's social status. From this, I am deriving a picture of Rebma as follows:
There are also Tritons in this background.
There are a few other pages devoted to Rebma, but they generally extrapolate in different directions than I do for this game.