Why no FPGA accelerator cards?

[bloodline]

I think the big problem with building a powerful (I.e. Not a real 68k based) accelerator for a real Amiga is that (for example), if you pit an FPGA card in the trapdoor... You could add fast CPU, better gfx, better audio... Perhaps some USB ports, a nice fast mass storage device... Then you wonder why you have the original Amiga in the first place

[bloodline]

How about a low cost ARM cpu board that runs an emulation layer of somekind? I figure the ARM is a good route because the CPU is so wideley used and thereI figure it's all well documented.

Exactly what I would do. I have done a bit of feasibility testing with my ARM M3 Dev board too.