Since the main audience in HN are techies. I think if we put tech jobs and startups as part of the equation, those rankings will change dramatically.
I know REA have a good engineering focus but there must be others
There are plenty of other smaller companies doing interesting work there, however!
Source: was living there 12 months ago
The tech community here seems on par with Vancouver as far as software goes, but much less in terms of hardware. At least it's not as Enterprise oriented as Sydney seemed to be.