QUOTE(One @ Sat 5th December 2009, 7:07pm)
I don't believe Wikimedia is a defendant. They're apparently very willing to cooperate with discovery. No skin of their nose.
They could always amend the complaint to conform with discovery. It might be good strategy to secure WMF's cooperation first. Still, more likely they will stick with user defendant(s). Challenges to Section 230 immunity could be a thankless task. It would probably be avoided unless it was one of their client's objectives.