Yeah I have few years experience of game jams. Have been a little too busy lately to participate, but I hope there will be chances. For busy people I recommend TriJam, as you need only 3 hours for it!
As for collaborating, I'm a bit of a lone wolf and might also be unreliable to work with... But maybe we'll cooperate via continuing each others' games some day! I'm looking forward to participate in days 5 and 6, maybe a little today if I find time.