After having a look at the Galaxy SII sales going on, Crazy Johns also have a competing offer. There is free on their $35 plan. 24 months jailtime, total min cost $840 plus you also get a free $50 Visa Gift Card.
Crazy Johns are on the Vodafone network, so you get all the same blackspots and poor coverage as they do.
Now i know Virgin and Voda have slighlty cheaper deals, but you get far more credit with Johns than Voda and Virgin ($330 vs $180 (VF) vs $190 (VM) you also have included 750mb vs 200mb (VF) vs 250mb (VM) data, free calls to other Voda, Crazy's and 3 phones.
These plans don't suit everyone, but suit me for a second phone (especially when the heat is on with personal calls on the work phone)
virginmobile has it for $27 per month for 24 months contract