Devs running their own PDS hosts are still unable to federate on the production network, for the time being. The dev sandbox will of course remain online indefinitely.
The major scaling push continues, but things are progressing rapidly!
We're checking the logs for what the earlier issues may have been.
The For You feed will hopefully resolve itself, it's likely caused by some caching on their side that they can hopefully improve. It may resolve itself (once the cache is updated).