Just wondering... how far can the Arcade FPGA be expanded? In a practical way though 
Am I correct to assume that with the expansion card it can do the following through re-implementation (avoiding the word emulation here):
1. Real 060 processor
2. Amount of RAM???
3. Picasso card in FPGA
4. Real network card
What else? Do we really want to add PCI slots to this thing 
Maybe we can have one inside an Amiga 600 case =) .... joking.
Well from my experience with my Deneb card in my A4000, once you get past RTG, just about everything else you want can be added via the USB ports. Plus, as you say, if there is room left over in teh FPGA then "hardware" can be added there too.
As an early Minimig user it has been fancinating to see how the core has developed over the years as individuals continue to push the boundaries. When I first got my Minimig I had 1.5MB RAM, OCS, 1 x Read Only floppy, no hard drive. It really was a stock A500 (with a scan doubler and a dodgy floppy). Then we got ECS, ARM Hard Drive (file) controller, read/write floppy support, then 4 x floppies, 2MB of extra RAM, hard file without ARM controller..... the list goes on...
We can expect to see the same evolution of the core with the FPGA Arcade until we end up with a "Super Amiga A6000+" and beyond. Not to mention the other computer cores and arcade machines.
This is going to be one hell of a machine.