We had the official preview back in June, but we have had to wait for Apple's new hardware before we got an official date for download for iOS 7.That date is 18 September, one week from today. So make sure you're ready for that. Or better still, sit back and wait for the rush to die down. Early the morning after tends to be the quiet time.iOS 7 is perhaps one of the more radical upgrades, not least because it ushers in a new era in terms of graphics. Sir Jonathan Ive has gone for a cleaner look, with translucent imagery across the platform. But the look is only half of the story, with new features added including Control Center, an enhanced Notification Center, better multitasking, content sharing with AirDrop, a step up for the Camera app (including new photo effects), better browsing with Safari and of course, iTunes Radio. More about that in a minute. Details on iOS 7 can be found here.If you want to get iOS 7 without buying the new smartphones, it will be available for the iPhone 5, iPhone 4, iPhone 4S, iPad 2, iPad 3, iPad 4 and iPad mini, via iTunes from an undisclosed time on 18 September. Good luck if you opt for the early download.As for iTunes Radio, it will be built into the music app, streaming music from radio stations you have created for your personal taste. A bit like Pandora, if you are familiar with that. There are also curated stations too, but all have one thing in common - ad support. That's unless you are an iTunes Match subscriber. You get to skip them.Sounds fun, ads aside, with iTunes Radio likely to be one of the more talked about features when iOS 7 launches next week.