Inside Mac OS X 10.7 Lion: AirDrop local file sharing (AppleInsider)
AppleInsider:
Inside Mac OS X 10.7 Lion: AirDrop local file sharing — Mac OS X 10.7 Lion introduces a new feature in the Finder named AirDrop, designed for easy file sharing between nearby systems. — AirDrop has nothing in common with DropBox, a cloud-based file sharing service more akin to iDisk.