Ruby Nights: The Auckland Ruby Group Monthly Meetup

Meetups planned for 2011:

June: How to: act_as

July: Mercurial and Bitbucket by Juri

August: Rails 3 for Beginners - Tong

Some more ideas (volunteers needed):

VoltDB Basics and Using VoltDB in Rails

Continuous Integration (Hudson etc.)

Autotest

Cool Gems

Understanding ActiveModel