The ticket is $16 for one day(door/Ticketek), and $28 for two days (from Ticketek). There's other tickets too.
Check out Pulp Expo
ictgeeknz: I haven't attended an Armageddon Expo yet - they do look really cool.
From the experience of the only one I've been to. Take your ear plugs..
I'll be there! def keen to meet some fellow geekzoners if your all heading there :D Let us know who/when/where!