Any know of a good snowboard that can can be used as a snow kiteboard?.What are the sort of things that you would look at that would make a good snow kiteboard?I would like to boost big and free ride few back rolls and front rolls that sort of thing.

check out the shinn snowboard, shinn use a fair bit of snowboard tech in their manufacture of kiteboards

Diamond, Use a twin tip board same both ways. I have ridden a Lib Tech Skate Banana magnetraction with the wavy edge. It helps bite into the ICY conditions we get in OZ. I have used it both riding with a kite and riding deep pow in OZ and overseas great board and relatively cheap. The biggest thing is to have comfortable boots and bindings board always comes second to that....

Cool that's some interesting info .Iam going to snow farm nz for my first trip and I was pretty keen to get a specific snow kiteboard .Is a specific snowkiteboard a bit more rigid than a normal snowboard?.

Some really good advice in here already.

You definitely will have an easier time with a centered stance as you will spend equal amounts of time riding in both directions on your heel side edge. A snow kite specific board will make it easier to edge your board in a straight line for extended periods of time on flat terrain, like on a frozen lake for example. I can't see that being much help up in NZ where there is a lot of variation on the terrain and you need to turn you board often. Plus most snow kite specific boards would behave pretty badly if you ever use them in a resort on hard packed snow, you'll find it hard to turn them.

To put it simply, the board that you'll choose will make the least difference in your snowkiting experience in NZ. I've taken many people up snow kiting over the years in NZ and it get can quite rough up there especially if it's your first time snow kiting, regardless of how good of a kiter you are on the water. You have to be able to adapt to ever changing snow conditions from wet sticky snow to powder to ice, crust, rocks, etc. and sometimes all in the same day! Basically you have to already be able to easily manage steep runs in ski resorts in any sort of snow conditions riding both regular AND goofy to really enjoy the terrain NZ has to offer.

Also, your board can get really trashed up there with all the rocks hiding under the snow, a lot of snow kiters I know just use to an old beat up board and they still ride amazingly well...

Don't believe the hype around snow kite specific boards, just spend your money on really good boots and get just about any half decent board with a centered stance, even used (or hire) and you'll be just as fine as with any other board.