Sorry for the delay, I've been a bit busy.
Board is up and running, no problems as yet.
There will be quite diverse core support, a fair number of people are interested in supporting it.
All the system on fpgaarcade have been ported (including VIC20)
I am working on Star Wars, BBC B and Atari ST.
We also have C64, spectrum, zx81, apple 1, cray 1(!) and lots of home games consoles being worked on.
I'm involved with the visual6502 project who are doing die scans of original chips and I'm converting these into VHDL - so we will get even more accuracy going forward for these retro systems.
Best,
Mike