Apple appears to have finally achieved supply-demand balance on its popular iPad mini, with the company's online stores for the United States, Canada, Australia, and a number of other countries now showing all models as "in stock" for immediate shipment. European customers are still being quoted 1-3 business days for new orders, although these will likely move to "in stock" relatively shortly. Supplies of the iPad mini have been constrained since the device's launch over three months ago, with