For Internet connections you only use occasionally, a long expiry period can be a boon. Telstra's introduction of an iPad plan with a 365-day expiry period expands the options for iPad owners who don't want to constantly top up their prepaid plans.
The 365-day micro-SIM deal costs $150 and includes 12GB of data. As our iPad plan guide suggests, the Telstra plan matches a similar deal from Vodafone, which also charges $150 for 12 months. Recent revelations aside, the Telstra option is likely to give you better coverage.