I posted that list of bios on wikipedia, so if it says 2003, I probably got that from the book. I think bmcg is correct and it was produced by Ring/Beat Scene. It's more of a chapbook than a full-blown bio/memoir. I don't remember much about the contents, I'll have to go back and check, but I recall being a bit disappointed by it. Perhaps my expectations were too high.
There's a great and grisly description though, of Webb's first meeting with Bukowski when he lived in the apartment on Oxford (1973?). It doesn't paint a pretty picture, but he's got some humor there.
Worth reading, but I wouldn't get into a bidding war over it if you see it on ebay...