Below is a listing of various kz communities:

Xtreme-Jumps
http://xtreme-jumps.com

Kzmaps
http://www.kzmaps.eu/news.php

Kz Monkeys
http://kzmonkeys.net/news.php

Phoogi
http://www.phoogi.com/upload/index.php

Kz-Usa
http://kz-usa.com/news.php

Kz-sca
http://www.kz-scandinavia.com/e107_plugins/forum/forum.php

Kz.fr
http://www.kzfr.net/news.php

Climbers Germany
http://www.climbers-germany.de

Kz Finland
http://www.kzmapsfi.net

Bulgarian Kreedz
http://bulgarian-kreedz.com

Climbers Argentina
http://www.climbers-arg.com.ar/

Kz China
http://kz.simen.cn

You has forgot about us:

Poland community:
http://kzpl.sti.net.pl/

xtreme-jumps.com doesnt work
its xtreme-jumps.eu :]

also, bulgarian-kreedz.com doesnt allow registrations or logins without special IE settings, use http://bkz.voxbg.com/

if you need a bulgarian mapping community, http://bg-mappers.headoff.com/
o_o