I'd be down sometime. Unfortunately it's japanese so it's brutally painful to engage in coop. First you have to have beaten at least the first boss (which isn't so bad really unless you intend to play coop and everyone makes new characters to play together and then can't) The host (which could be anyone) has to be alive, as in recently killed a boss or popped a stone of ephemeral eyes, and all the people who want to join him have to be dead. Have to be within a certain level range of each other (can't borderlands it with a level 61 dude and level 1s). And my favorite part is the coop invite system, both host and joinee enter the same dungeon (solo) and then the joinee puts down a sign saying hes open for business. At this point anyone who meets the requirements for hosting is able to drag the joinee into their game, and then the joinee has to bail and put another sign down and hope that his friend can beat out any random people to pulling him into coop.
It's fun but it's the enemy of freedom. And a good reason why the firebombing campaign should have continued indefinitely.
I'm down for anything right now, Hockey, Battlefield, Borderlands, Demons Souls, MLB The Show, Red Dead, Shadowrun...whatever
Edit: The Transformers multiplayer demo is pretty fucking fun fyi