Dirk is a programmer and researcher. His home-page can be found at www.riehle.org 
.
In the patterns community, he is
an editor of volume 3 of Pattern Languages Of Program Design, and
the program chair of EuroPLoP '97
In the wiki community, he is
the chair of Wiki Sym 2005, the 2005 International Wiki Symposium
Contact him at mailto:riehle@nospam.org where you replace nospam with acm.
See original on c2.com