Nice list of social data visualization sites, along with news of a new one, Verifiable:
The new website Verifiable is yet another contender in the now seemingly crowded social data visualization area, which include other free services like Many Eyes, Swivel, iCharts, Trendrr, Widgenie, Track-n-Graph and Timetric. The goal of Verifiable is to “democratize data” as it allows to easily upload data, visualize it, join it with other data, and allows “the world” to interact with it.
via Verifiable: Upload, Visualize and Share your Data Online – information aesthetics.