Instagram has announced that they now have 300 million users, a growth of 100 million since March, and a number that makes the image sharing site’s community “likely bigger than Twitter.” Instagram’s founder credits their relationship with Facebook for the impressive acceleration in size. Just yesterdaywe wrote that the app has quickly become a force that startups try to replicate, and is influencing the future of advertising. This influence could continue to grow along with their user base. (Mashable, WSJ)