It’s great for Telecom that they now have iPhone distribution rights, and that’s also great for competition in the marketplace.
However I do recommend that you look closely at the fine print in their plans and be careful about your approach.

1: If you want to have the maximum amount of data then it seems like you will need to buy 2500 texts and 500 or 650 minutes of calls [edited to correct flipping of calls an minutes – thanks to @silentTracks]. There is, however, a better way – below.
2: The maximum amount of data on offer is just 3GB. I used 6.6 GB in 10 days in a recent trip to Australia (thanks to Dropbox mainly), so if you tether and travel a lot then this could be exceeded. Even without tethering iCloud syncing over 3G will have a decent impact on your data use.
I strongly believe that we should be able to use all of our internet enabled devices with no regard to limits, and when we do so it is transformational.
3: If you were to use 6 Gb in a month then you’ll be paying the 10 cents per MB, or $100 per Gb rate, so that’s an extra $300 on your bill.
3b: The iPhone automatically switches many texts onto iMessage, so even if you are sending 22 texts a day then your usage will drop. However if you are under 20 (say) and send 50 texts a day then expect sticker shock as the texts above the limit will cost 20 cents each (although the table above says 20c/min). In this example the extra payment would be $170.
4: If you want to call international then it’s better to use data and something like Skype. It’s amazing that charges of 91 cents or $1.43 a minute are thought by Telecom and other carriers around the world to be acceptable these days. They are not.
Next are the terms and conditions.
- They show that the lessor plans have a more punitive cost per megabyte, so using an extra 3GB will cost you $600.
- Pxts will cost 50 cents to other networks, 20 cents to Telecom phones. Using iMessage will make this free.
- I’m not sure what a data boost is, but at $200 per Gb I certainly don’t want one
- Voicemail costs money, and early disconnection fees exist but are not stated

Overall I’m very disappointed not to see a data intensive plan that has less text and calling. The bundling approach used is a deliberate attempt to hold on to those traditional revenues, but I am concerned that Telecom’s plans don’t reflect that iPhone users spend the vast majority of our time using apps or data and only a little bit of time calling or texting.
However there is a solution – though you’ll have to dig around for it. Telecom offer “boosts” for all post paid plans, and you can add 4 Gb to any plan for $80.

If you exceed the 4Gb then you automatically get another 4Gb for another $80 (after which it’s back to $100 per Gb). This means you can tether for a much more reasonable price and get ride of any mobile data sticks and so on that you have.
I have this plan, and while I have yet to kill off the stick plans, I get by very well by only tethering.
However I have no idea how to add this plan to the pre-ordering for iPhone, and do not even know whether it will be possible to add to the plans.
If so then the recommended approach for a heavy data iPhone user (aren’t we all) would be to choose one of the lower plans (the $120 one say) along with the $80 data pack.
[update]
@Bandit has directed us to the Business plans, which appear cheaper at first. However they are all priced before GST, and to my eye look similar to the consumer plans for data. They seem to have dropped the number of texts and increased the minutes versus the retail plans, which makes sense, but data is still priced the same.

I can’t find the add-ons page for the $80 for 4Gb deal, but I did find this shamefully priced extras piece on the “business share” page.

Those internet overage rates are $670 and $440 per GB, so my extra 3 Gb example above would cost me just around $1300 or $2000 each month. These are wildly unacceptable.