Google is contacting all the Google X mirrors about using the Google Brand. Looks like Google X is going to vanish. (via SE Round Table)
It has come to our attention that you use functionalities related to the Google brand (commercial logos, Web pages, screenshots or other Google functionalities) on your site without the preliminary authorization of Google.
If you continue to use these functionalities related to the Google brand on your site, a Google representative will contact you.
We thank you for your comprehension.
The Google Team