Facebook announced shared photo albums, a new feature that lets multiple users upload images to the same album. The original owner of the album can add up to 50 contributors, who can each share up to 200 photos to an album. Album creators can choose a setting that allows contributors to invite others – or retain total control over an album. It’s easy to see how companies can invite large numbers of consumers to collaborate on crowd-sourced albums showcasing a particular product, or wrapping offers up into album-sharing functionality. It could prove to be a powerful marketing tool to galvanize visible support.