There's a sizeable obituary in today's (9/12/99) about Moondog. I 'spect you can find it at the New York Times website. I never came across him in his years on the the streets of New York but some of his music moved into the folk idiom. Also some musicians that I know who knew Moondog were quite in awe of him.
I would guess that a few of the people who come in here to chat may have known him or of him.
Wally