Hi Mauied, where in the North Island are you going?

If you're just up in Auckland there's not too much I can suggest. Some great clubs and restaurants down the waterfront.

There's this shop I stumbled across the last time I was up in Auckland (I'm sure there are a couple of others too) http://sites.yellow.co.nz/site/havanahouse/

It's a B&M, but not a B&M as you know them (there's no onsite smoking - actually there's an almost total nationwide smoking ban) . And be prepared for sticker shock - if not buying duty free.

Further south there's the touristy Rotorua where they'll set you up for tours of bubbling hot mud pools, hot springs and Maori culture shows.

There's bungy jumping all over the place, traditional and the 'vertical' type.

Not many tourists venture out of the Auckland area unless it's to go to Queenstown (in the South Island), but if you're heading down to the lower North Island I've got a few more things of note you may be interested in. Let me know.

I'm in Wellington (aka Wellywood) if you make it this far down.

Just in case you haven't checked it out hae a look here... http://www.newzealand.com/travel/International/

Enjoy your stay.

Cheers