They did.
http://git.fail0verflow.com/
They took it down now (understandably).
Oh yeah, forgot about that.
QUOTE said:
The FAIL0VERFLOW Defendants confirmed their collaboration with Hots by posting the following statement on their Twitter page: "We discovered how to get the keys...Geohot exploited metldr, then used our trick to get its keys"
That's not collaboration. Collaboration is people working together on something. They did something, and then he took their work and did something else, something they may not have intended to do (or at least release). Their aim was to get Linux back, I don't believe metldr keys were necessary for that. Certainly in one of the other documents it had fail0verflow quoted as saying that Geohot releasing those keys was unnecessary and harmful to Sony because it would eventually lead to piracy.
EDIT: QUOTE