Optus has announced its iPad data plan pricing and details for the Australian market. For pre-paid users, Optus is offering a wide range of options, starting with a $30(AUS) SIM Starter Kit that includes 2GB of data, plus an extra 1GB of bonus data—included with every pre-paid plan—for a total of 3GB of data use over 30 days. After picking up the SIM pack, users can choose from plans that run for 15 days—one for $15(AUS) plan that…