Author of Practical Internet groupware, which is now sadly out of print. A smart guy, with lots of ideas about groupware, peer-to-peer, distributed HTTP servers, web services. Lots of things.

Many of the ideas in Practical Internet groupware blew my mind. Unlike most O’Reilly books, which are “Howtos”, mostly, PIG has mind-blowing ideas on every page.

The links to his old blogs seem to have bitrotted.

However, he has a current blog.