http://forums.spiralknights.com/en/node/114100
What this means:
Spiral knights will not shut down, at least for a while. However, it's up to them to develop new content for it, which seems unlikely as they seem more to just be saving it. They can move the game in a new direction if they WANT to though, so we may see an ending yet.
Discuss, since I don't know everything.
Also, note the fact that Eury said "keep games we love alive."
IMPORTANT EDIT:
Eury just stated in a post down below that Gray Havens is NOT a museum for games and that description is out dated.
This means we could possibly perhaps theoretically mabye have new content!!!
Finally, a new start. Now lets all just hope that Grey Havens is nothing like OOO and will actually listen to ideas produced by players :D