As per the discussion last night here are some interest groups that might want to meet up whenever possible.  You can use scheduling tools such as Doodle, skype, irc, mailing lists, carrier pidgeons to sort out the date/times =). Some of the groups might want to specialise further (such as Python, Apple "iDev", web, etc). As always edit as necessary.

Programming

• Apple Device Development

Manufacturing/CNC

• CNC Milling

Electronics

• Arduino Hacking

Arts

Robotics 

• Autonomous Robotics

Juniors

• Special events for kids in primary & secondary school