The fifth (not fourth as i mentioned before) Jaguar Connexion will be held in Congis-sur-Thérouanne (you can't invent such a name) near Paris on 23rd and 24th of April this year.
This party is centered around retro-gaming and gaming in general, you'll be able to see nearly every oldy machines ever done and play with them. A gaming contest is set up troughout the whole week end on different old machines and will be rewarded with a Nuon N-501 DVD player (..!..).
Places are limited and registration is necessary. All informations are right there on Yaronet.
P.S.: GT Turbo made another (french) tutorial on how coder could use Neo-master to their benefit.