I did it! I created a social network this afternoon! Ok, ok, it builds on the strengths of GitHub.com Issues and Gitter.im (chat for GitHub users.) But…
It's called 'Topics' [github.com] - a name 'chosen' by our very own @matigo.
Ah, yeah, you guessed, I'm no threat to Jason or anyone else. More of an integrations exercise than anything else, I expect nothing to come of it, will be disappointed if it's useful. :)