Google has enabled what they call "enhanced content" in email messages -- which comes in the form of a gadget that serves up additional information (rather than simply the static message you would find normally).
The idea is a good one -- real-time content in messages could be quite interesting. The icons you find in your inbox also help you identify legit messages from trusted senders -- though I'm still not convinced I am going to enjoy seeing these icons scattered throughout my inbox.
To "unsubscribe" from this enhanced content (but not necessarily unsubscribe from the subscription), Google gives you the option to do that in a dropdown found at the top right corner of these messages.
Have you seen these "enhanced" messages yet? What do you think?