I've seen the concert that Xolin mentions. It's from the '85 Montreal Jazz Festival.
It's Ornette Coleman and Prime Time: two bassists (one was Jamaaladeen Tacuma), two guitarists, two drummers, a tabla player and Orrnette! Pat Metheny joins in on his synth-guitar for the final section (and breaks a couple of strings too!). The whole sound is very 80s - i.e. lots of slap bass and electronic drums. Not music for the Wynton Marsalis crowd!
Ornette's touring band for the last few years has been a quartet, with his son Denardo on drums and two double-bass players. I think there is supposed to be a record coming out this year.