Virgin's $30 12M SIM Only plan will be changed for tomorrow (22nd August) only, from 5GB per month to 7GB per month for the life of the plan. This will be available in store and online. If you already have a Virgin postpaid service and add this to your account (or you bring more than one number) then you will also be eligible for their 1GB bonus data for multiple services, making this 8GB.
As with all of their 12M SIM plans, this can be upgraded to a higher 12M plan at any time without extending the contract, or can be upgraded to a 24M Phone plan without any cancellation fees. Cancellation fees will be (25% of the monthly cost)*(number of months remaining) if someone does decide to cancel. See the CIS for full details.
EDIT: This doesn't appear to be listed on the website (as yet). If you go through phone sales or in store it is available. Existing customers check the app to see if the plan is listed there.
Awesome! thanks for this. have been waiting to upgrade from my $19 1.5GB plan and wasn't ready to pull the trigger with their 5GB offering. 7GB I'll definitely jump on.