Shane did come back to The Pogues ;) in my opinion The Pogues cannae be The Pogues without him.
They continued Shaneless for a few years then stopped altogether until the band re-united in 2001. They have not made any new albums, and currently have no plans to do so.
They regularly tour, always in the States (mostly East coast..which is unfortunate because I'd love to see them) at St Patrick's Day time and all over the UK in December.
They have had at least 13 members...and currently have 8. They play a variety of traditional instruments, which combined with Shane's voice give The Pogues their unique sound.