Excerpt from Apple’s website:
With AirDrop in Mac OS X Lion, you can send files to anyone around you — wirelessly. AirDrop doesn’t require setup or special settings. Just click the AirDrop icon in the Finder sidebar, and your Mac automatically discovers other people nearby who are using AirDrop
Wouldn’t it be cool if you could drop any contact, picture or tune in Airdrop and see it magically appear on your iPhone, iPad or iPod Touch?