This past week at Mashable Connect, the UN Foundation’s Robb Skinner, 92Y’s Henry Timms and Mashable’s Stacy Green announced the exciting partnership that is bringing the world Rio+Social. This is a first-of-its-kind meeting that will bring social media leaders, United Nations leaders, pioneers in innovation and global thinkers into the same space to talk about sustainability, the future of world, and how we all can make a difference. Mashable posted about the meeting today — listing the speakers that have confirmed to date — and we are already seeing tremendous excitement build about how social media can help drive progress. Mark your calendars now for June 19, and get involved with the conversation already underway at www.rioplussocial.com.  Check out Mashable’s post here.  How do YOU think social media can and should play a role in international development, sustainability, and the future we all want?