The BoingBoingularity:
When the universe is reduced to nothing but a loop of cross-referencing blog entries sometimes persisting and sometimes disappearing. The content of each post being the same video of a group of long lost editors discussing dropping comments.
The Doctorowularity:
The universe reduced to a series of gothic hallways connected by ascending and descending stretch elevators with ominous but corny narration. Some hallways end in queues awaiting turns at dark rides with gondolas that direct your attention by swinging around to point in different directions at displays of consumer goods from various pasts and futures each introduced by an animatronic president speaking with the voice of Walt Disney.