Would it be possible to burn another ffpga or flash rom to replace this ASIC controller chip, or is this not standard enough to be worthwhile?
The key thing about the minimig is its code is available so you could put it on any make of FPGA you wanted. (or even CPLD although it would be a bigger CPLD than Ive ever seen, it would need thousands of microcells)
The only problem is larger chips are normally BGA (they have solder balls under the chip that act as legs) which cant be soldered by most home DIY'ers so you would need either a developers board made by the FPGA company or to get a design made for you.
As for making it an ASIC I would think that was a bad idea as when a revised minimig core comes out you would need to make a new chip. :-/