Vodafone and 3 have both long offered good value in 3G broadband (whatever you might say about the speed), but with the caveat that you had to sign up to a 24-month contract. A refresh to its plans today eliminates that nuisance, with the same value offered on month-to-month rolling contracts.
While there's been a number of other adjustments, the big shift is the introduction of plans with a one-month contract, ranging from $15 for 1GB to $49 for 8GB. That's essentially the same prices that Vodafone and 3 were previously charging for long-term contract users. You can either use your own modem or purchase one for $79. Super-casual broadband customers would probably still prefer pay-as-you-guy, but as an insurance policy for when ADSL goes down, $15 a month with no lock-in is pretty cheap.