Randonneuring Clubs in Canada

Alberta
Alberta Randonneurs

British Columbia
BC Randonneurs

Quebec
Club Velo Randonneurs de Montreal

Nova Scotia
Randonneurs Nova Scotia

Ontario
Randonneurs Ontario

Saskatchewan
Prairie Randonneurs

International Randonneuring Clubs and Organizations

ACP Regulations
Audax Club Parisien (Paris-Brest-Paris)
Audax Brasil
Audax UK
Boston - Montreal - Boston
Central New York Brevets
Les Randonneurs Mondiaux
National 24-hour Challenge
New Jersey Brevet Series
North Carolina Bicycle Club Brevet Series
Edinburgh - London 1400K
Gold Rush Randonnee

A few worthwhile links:

PBP History by BC Randonneurs
BC Randonneurs and PBP history

Brevets explained in Wikipedia
Brevets

Paris-Brest-Paris reference in Wikipedia
Paris-Brest-Paris

Randonneur reference in Wikipedia
Randonneurs

Official Paris-Brest-Paris
PBP