It's funny - I had my hand at this kind of tongue-and-cheek humour with my major project last year at uni. Even though I went down a different track this is an example of what I was trying to go for. In the end I made a campaign encouraging New Zealanders to return home.
By this I used that emotional pull most people have when living away from home and pulling those strings about home and what they're missing out on.
Most importantly - and tying my campaign and this campaign together I used that Kiwi humour and had that local tone this campaign has in it - one that only Kiwis can relate to... I'll post up an example of my work soon.