@ Wawrzon:
There's still lots of "tweaking" going on, and the details are available on the FPGA Arcade forum. It is worth signing up as new developers are appearing on a regular basis, and each of them has a desire to create a new core.
Right now we have some final touches being applied to the Amiga core, a working VIC-20, work in progress on various Atari cores, work in process on the C64 and some aracde games in various statges of development.