outsidethe.net is an SRE and Operations-focused link-aggregation site created by Sam Pointer, launched on November 8th, 2016. It runs on a fork of the lobsters code-base created by Joshua Stein.
Many of the contributors here live and work in London, England. Quite a few could be considered members of the Playfish Mafia. The 'Playfish effect' is well documented.
You must be invited to the site by somebody that you know. Send that person a message by whatever means you already have established and they will be able to send you an invite.
Hats can be requested on their individual merit, and give a mechanism to indicate in what capacity you are making a comment.