We don't know how long the sale is on for, so you might want to be quick if there's an app or two that you have your eye on – we just feel sorry for anyone with a 16GB iPhone – as when else are you going to get a chance to spend money on apps you'll buy and then never play but come on you had to buy them it was a good deal?.
Rather annoyingly, Apple doesn't seem to have made a dedicated area in the App Store for this sale, so you're going to have to do a bit of hunting to find a bargain. However, if you have an iOS device you can go to the iTunes website and see a list of discounted apps there.
