Even if you're not getting a new iPad or Apple TV, yesterday's Apple event is relevant to your iOS world, thanks to the release of iOS 5.1. It's not a major upgrade, but it does add a few useful new features. You can see an overview on CNET. One of the most requested new features is now available: the ability to delete individual photos in Photo Stream. Another important feature is the ability to take a quick photo without unlocking your device. This was first available in iOS 5, but wasn't always visible. Now it is.