> Maybe they are prepping to do something on their own.
As listed above, it's probably because they're already in the middle of their own[0] (assuming that they will appeal, which I'd imagine is almost certain assuming they can fund it).
The EFF has been fighting this battle long before the Snowden revelations, so it's certainly not for lack of interest that they're not a claimant in the Wikimedia case.
I'd like to see the NSA under fire from many opponents rather than just one.