Ok, so X ARM has nothing to do with Brazilian Jiu Jitsu, but it might be the most amazing offshoot of MMA ever conceived. Take two guys, tape up their arms in an arm wrestling position, and then let them punch each other in the face until someone "wins". Armbars, head kicks, and even arm wrestling taps ALLOWED.
The best part of X Arm holding a second event (4 years after X Arm 1)? JAMES IRVIN is on the card. This is no longer a sport for CFL dropouts and Junior College Linebackers, real men, with real striking skills, are now competing. While I still highly doubt this event goes down, if it does, I will be watching (on youtube. :) ).
More details about X Arm 2 are at MMA Junkie