Where is microdata (schema.org) already being used by major search engines?

[nicole.healthline]

I know Google recently launched their recipes search, but apart from this where else are you seeing microdata being used?

[RyanKent]

Google shared they tested it with numerous major sites and it is implemented.

For example, search "Matt Cutts" in Google. Notice how you see his profile image to the right of his results? I believe that is due to the rel=author tag.