One area that's been quietly changed in iOS 7 is the keyboard. As pointed out by TechHive, there are new characters and useful shortcuts that'll make your typing time a little bit easier.
You'll see these changes in apps that are updated for iOS 7, and the changes can be subtle. The Twitter app, for example, now inserts both the @ and # symbols so you can easily message someone or write a hashtag. There are also a handful of hidden characters that are accessible by holding down a key on the keyboard. The one I use the most is the "", which is available by long-holding the period key.
You can check out a longer list of shortcuts in
