I'm waiting for the 060 (FPGA based) card, I hope that he'll make it one day!
I am sure MikeJ will follow through with his daughter board design and get it produced, at least in enough quantities for you and I to get one for our FPGA Arcade Replay boards.
I think both his Replay boards and the prototype daughter board that has been shown already are fantastic projects and worthy of becoming successful retail products. They show off MikeJ's design talent and he has thought them out well, with great expansion possibilities for the future. The FPGA Arcade Replay board and it's daughter board, plus the Natami (when it finally sees the light of day and becomes available for purchase by anyone) will raise the the capabilities of AmigaOS3.x to new heights and hopefully inspire more new Amiga software to be written in the months and years ahead of us.