As the title says :) I think in asking this question I am excluding sites that are exclusively devoted to a particular character’s RP log. They can be RP-related of course but I am looking more at things that an uninvolved third party can find useful
There are a number of useful Twitter feeds, especially since the Failbetter staff tweet regularly (and sometimes post content / links to articles there that don’t get mentioned elsewhere).
This one: http://echobazaar.wikidot.com/ has actually been inactive a while, or close enough to count. it’s not reliable enough to use, so save some time and use the other one.