The legendary Billboard charts are now open for mixing, not by DJs, but by programmers. Billboard, a service of Nielsen Business Media, has a new API that lets developers search and read information from all the Billboard historical charts. The initial offering is its Chart service and later on Billboard will "roll out the Artist and Track services to add even more depth and perspective." the API is a simple REST interface that developers can send HTTP GET requests to in a familiar service/version/resource fashion. We've added a new Billboard API profile with details.
Google has released a new version of the Google Visualization API that features new chart types including sankey diagrams, calendar charts and annotation charts. The release also includes new features and improvements such as string to number conversion in datatables, the ability to export corecharts and geocharts as PNGs, and crosshairs for scatter, line and combo charts.