Yet more functionality unveiled

For anyone that uses it (which should be everyone!), you can now track how many of your pages that use structured data are in Googles index. eg, pages with reviews on, microformats, schema.org etc.
To see it, visit the optimisation tab in webmaster tools, and you should now see a "structured data" option.
If you are having issues with your structured data, don't forget the good old rich snippets testing tool.
If you have no idea what I'm talking about, then here's the beginners guide:
Rich snippets (microdata, microformats, and RDFa) - Webmaster Tools Help