Nigel has been using PmWiki since being introduced to it in 2006 by Guy Dickenson of Participo. Prior to that he had been using Twiki and MoinMoin for similar purposes since 2001: developer knowledge sharing, building usergroup newsletters, and documentation.
Most recently he has been helping SQLstream Inc build their documentation on PmWiki and WikiPublisher as a better and more scaleable approach than using FrameMaker.
Nigel can be reached on the PmWiki and WikiPublisher mail lists (sadly, not having much free time to contribute), or via nigel AT preferisco DOT com. He is based in Suffolk, UK and you can read more at Nigel’s Linked-In profile.