Apple Patent Could Bring New Type of File Sharing to iPhone & iPad
mashable.com
mashable.com
It seems like this is an "idea patent" rather than an "i invented something and spent a long time developing it and now i need to be able to protect my investment patent".
Not sure if that feature made it into the commercially available version, but they definitely still have the proximity features, which are pretty cool: https://www.sifteo.com