Some pretty good midday reading for you if you're at all interested in what goes into fighting game development. Christian Nutt of Gamasutra has a five-pager with a handful of developers from Arc System Works. They cover the state of the fighting game genre, the team's own personal philosophy on building fighting games, the challenges of taking fighting games online, and even a bit about some of the other big fighting games out there.
Just to sensationalize this thing a bit, here's the part where the creator of Guilty Gear, Daisuke Ishiwatari, gets a little raw:
DI: We don't really have a sense of how popular fighting games are in the states, so it's tough to know how much demand there would be for accurate online fighting. We know the FPS is king there, and also that Soulcalibur, which I personally think is junk, has a big following.
Word. Be sure to check out the full interview.