You can contact the NZPUG committee via email: firstname.lastname@example.org
Or just say hello at your nearest monthly meeting - see the links in the get involved menu!
You can contact the Kiwi PyCon planning committee committee via email: email@example.com
The postal address for the New Zealand Python User Group is:
New Zealand Python User Group Incorporated
c/o Catalyst IT Limited
Level 6, Catalyst House
150 Willis Street