I saw him once, at the Knitting Factory in 1999. He was playing drums just as well as ever, and the group featured Eric Person on alto and Cary DeNegris on guitar-- I heard two excellent sets.
As I recall, there was a very small crowd present, and it was in the Old Office, a small venue in the Knitting Factory. During the break, I wandered over the main space, which featured Cyrus Chestnut and was packed. Talk about world gone mad.