Color is an iPhone/Android App that lets you share location-tagged photos. What's new about Color is the way it builds your contacts: it shows you photos from people who're currently within 100 feet of you, whether you know them or not.
For parties, play dates, lunch? You get their photos, they get yours. Share any album with Twitter and Facebook. Simultaneously use multiple iPhones and Androids to capture photos, videos, and conversations into a group album. There's no attaching, uploading, or friending to do.
Share together in a new, moving social network. Just look around.
If you're around someone all the time, Color will figure out that you know that person, and start showing you more of their photos. Meanwhile, photos from the strangers who move in and out of your life will disappear as quickly as the people themselves. This "elastic" social network is supposed to encourage people to say hi to one another, while keeping the photos relevant by showing your current location.