Dropbox has acquired Snapjoy, according to Snapjoy’s blog.  Dropbox and Snapjoy are both YC alumni, with Dropbox from YC Summer ’07 and Snapjoy from Summer ’11.  Snapjoy is an online photo gallery for importing, organizing, and adding context information to photos.  Snapjoy’s blog post states the goal of the acquisition by Dropbox is a better user experience through the synergy of Snapjoy products and Dropbox infrastructure.  This is the second acquisition in less than a month for Dropbox, which also recently acquired the Audiogalaxy music streaming service.