I found the announcement for Facebook's PUE and WUE dashboard on The Register.
Bit barn efficiency metrics on a minute-by-minute basis
Facebook has heaped pressure on major data center operators to be more transparent, publishing a dashboard that gives up-to-the-minute figures on the efficiency of the social network's gigantic bit barns.
But, no reference to the Facebook url.
Looked at DatacenterKnowledge, again no URL for the Facebook dashboard.
Then hit GigaOm and found the URL.
With the blog post that the Register and DCK use to report.
It is a bit ironic that in a post about transparency it took me so long to find the original FB blog post and the dashboard. https://www.fbpuewue.com/prineville with one years worth of data.
Disclosure: I work for GigaOm Pro as freelance analyst and like the fact that they embrace transparency in reporting.