Yeah Pokémon Bank is back up in 'certain Asian countries'
Also, yes I believe there is still a 30 day trial
>Trainers who were lucky enough to access Pokémon Bank upon release will also have their 30 day free-trial reset upon re-release.
The last question however, is unknown. No idea when it's going to be released in other countries for now.
Here's some random article on it :D