Not a gamesystem most people are keeping up-to-date for so I will let you know that in the past times Virtual Jaguar has improved emulation and also an interface. It now plays some games it could not before - some 'interesting' ones ;-)
Jagulator is having work done to it. The author is RealityMan and is working in assembler to bring a very fast emulation!
http://www.jagulator.com/
http://icculus.org/virtualjaguar/
