Conversation so far:
When was their third hiatus?
October 31, 2009, resulting in Slipknot's third hiatus.
Why did they take this hiatus?
several band members focused on respective side projects.
What projects did they work on?
Taylor founded Junk Beer Kidnap Band and returned to Stone Sour with guitarist Root.

Question: What did the other members work on?
Self-contained rewrite: Besides All Hope Is Gone, what did the other members of Slipknot work on during their third hiatus?