Until recent dates we have a reference to federated GNU Social nodes at fediverse.org.
As that domain it’s no longer available, I’ve recovered last update at Wayback Machine at archive.org (2/4/2018) and managed a little to publish most data here.
On that date there was 228 federated nodes identified. 123 are still active at end of Mars 2018, 49 with open registration.
Yeah, actually I'm very lucky, I have just the right amount of teeth missing so qualify for the good stuff, and I don't have to pay, because I'm a Haertefall. So even if my mouth is a real mess it could be so much worse.
Hehe. I thinks Mrs Whistlewright is getting old just as fast as you (and me) ;-) I hope you get better soon. Enjoy the wine. I'm off to bed now, it's way past my bedtime ;-)
"We are facing a period of development that will perhaps eclipse the darkest times of the past. We must have no illusions. What we write today can be completely erased in bad years to come, but what we create in new thinking and action, in realities, will be like a strong tree that defies all storms and becomes a forest if only the seed was good and the earth into which it fell was valuable".