He used to get a lot of slack for some of the stuff he drew, like hate mail and such, and he took it kind of personally. I guess one day he just decided enough was enough.
Used to talk to him on Yahoo, he's been one of my favorite artists for the longest time.
Place to find more of his art. This was done by his community fans, he updated it a bit himself then disappeared.
http://groups.yahoo.com/group/goulygallery/
http://groups.yahoo.com/group/goulygallery2/