I just came up with a crazy idea just a couple of months ago when i got to know about Google goggles. Google as always produce some innovative products Google Goggles is one of them. just watch this video if you don't know about Google Goggles
So the thing this great application lacks is the lack of data in the database. so i just came up with an idea of integrating Facebook with Goggles i know it is a crazy and fancy idea because it violates all the privacy laws. :) but thing i just want to say is that something like facebook which has over 500 million users and it has a huge collection of photos of so many people in different angels with different positions and most importantly they are manually tagged so using these type of a database it is much easy to implement Goggles for people search there are so many technical problems (frankly speaking i can't do it but facebook and Google can.. :)) as well as legal issues although we can use the photos which were made public (then there won't be any violation of privacy laws i guess) anyway this is just a crazy idea...
cheers !
-Kesh