I still haven't grasped what it is about, so I just report the "official" description:
SuperHappyDevHouse Aotearoa is inspired by SuperHappyDevHouse, a monthly hackathon event in the US, combining serious and not-so-serious productivity with a fun and exciting party atmosphere.
The whole thing is about rapid development, ad-hoc collaboration and cross pollination. Hardcore coders, l33t hax0r, passionate designers, and other types that enjoy software and technology development will be at home in the SuperHappyDevHouse.
This is not a marketing event. It's intended for passionate and creative technical people that want to have some fun, learn new things, and meet new people.
There will be 45 attendants (including Ivan Porto Carrero, the 3 guys from Mindscape, Darryl Burling and other 39 LAMP/Linux developers), a lot of lightning talks, from complex linux programming stuff to lighter "social" talks, and free food and drinks from 10am to 5pm.
From what I understood it should be a place where "creative technical people" meet, work on their projects, show them to the other guys, collaborate and maybe come out with some new ideas.
Will tell you my impressions on the shdh in the next few days.