If you bring your broken black iPhone 4 to the Apple Store, you might get a fresh iPhone 4S as your replacement phone. What?! Yep, because of supply constraints, many Apple Stores (at least in the States) don't have any black iPhone 4 units (16GB/32GB) in stock so they have been instructed by Apple to give customers an iPhone 4S instead.
That means if you have a phone that's broken right now, you can get all the upgrades that the iPhone 4S offers -- Siri, A5, better camera -- for free! What a timely break. This actually happened a few weeks ago with the white iPhone 4 16GB (GSM) where Apple was giving users with a broken iPhone 4, a new (er, probably refurbished) iPhone 4S. The constraints with the white iPhone 4 have been resolved now and you can expect the problems with the black iPhone to fix itself in a few weeks too.
Of course, scoring an iPhone 4S all depends on the stock of your Apple Store (and again, we're not certain of the situation in Australia), but if your iPhone 4 breaks today, just know you might be getting a better phone as a replacement. [9to5Mac]