Mobilious

“…Best deal on a 24-month contract: Vodafone’s $69 deal for the 16GB model offers 1GB of data and $400 of calls. On launch day, Optus announced a $10 rebate on its $79 plan which means it offers more calls and texts — but the fact you’ll still have to pay the tethering charge makes it a pricier deal unless you really just want the iPhone to be a phone.

Best deal on a 12-month contract: Optus was originally the only provider offering a 12-month contract, but Vodafone has also added that option, albeit with high handset charges. hard to pick here, though again tethering would be an issue for Optus users.

Best deal for an outright buy: If you can get to an Apple store, then its apparent prices of $879 for the 16GB model or $1040 for the 32GB will be hard to beat.

Best telco for tethering: Vodafone is the best option if tethering is a feature you want to use regularly as (opposed to occasionally) — Optus’ tethering charge puts it out of contention and Telstra’s data allowance is way too stingy…”

Picked from: http://www.lifehacker.com.au/2009/06/best-australian-iphone-3gs-deals/