The Astonishing Tribe (TAT), using software from Polar Rose, has created a mobile application that uses facial recognition to perform social search. Users submit photos of their faces to the Recognizr website, along with what web links they want associated with them (e.g. blogs, Flickr, or YouTube). Then by downloading an app to their mobile phone, they can take a photo of a stranger, submit it to the website, and if that stranger is a Recognizr user, find out all about him/her.
This work reminds me of Bradley Rhodes‘s old wearable/AR emacs plugin, the Remembrance Agent. The idea behind that application was that, while wearing a PC-104 based Lizzy wearable computer, you’d type in names into emacs, and then bring up whatever notes you had about them. I don’t remember if it integrated with the Insidious Big Brother Database or not.