Sharing is getting just a little bit easier in iOS 7 with the addition of AirDrop. Just like in the latest versions of Mac OS X, you'll be able to share photos, contacts, notes and the like over a peer-to-peer Wi-Fi network or over Bluetooth. So any item that works with iOS's share function, can be sent to others through AirDrop. And, of course, you can share with multiple friends by tapping everyone and anyone from the share sheet, if they're available.
AirDrop supports the iPhone 5, iPad (4th gen), iPad Mini and iPod touch (5th gen). [Apple]
Update: Here's a list of new iOS 7 features that may or may not work with your older model iOS devices.