As already noted in the thread on our being defederated by lemmy.world, we are now refederated for the time-being. However, as noted by one of the l.w admins if there are any spamming issues we'll be back out again and if the upgrades stop we will have trouble with federation (lemmy.one is still not on the latest version, while we are), so there is still a need to sort this out.
I tried contacting him here a while back. So far no luck. But I'm not gonna stalk him to get his own instance in order.. So I hope he pops up!
Yeah, we've given it out best shot, it's up to Tom now.