How instructive is it that the EFF was able to file a brief with the FISC and be granted a motion on a federal lawsuit? That seems pretty similar to the powers of a typical federal court. Note: I'm no lawyer and did not stay at a holiday inn last night.
The EFF's actual FOIA lawsuit is filed in the U.S. District Court for District of Columbia. You can read the FISC court's opinion to get an idea of what powers it things it has with respect to that ongoing litigation (http://www.uscourts.gov/uscourts/courts/fisc/misc-13-01-opin...). The relevant part is at the end:
"For the foregoing reasons, EFF's motion is granted in part. The Court holds that FISC Rule 62 does not have the effect of sealing copies of the Opinion in the Government's possession and that the Court has not otherwise prohibited the Government's disclosure of such copies in response to the EFF's FOIA request. This Court expresses no opinion on the other issues presented in the FOIA litigation, including whether the Opinion is ultimately subject to disclosure under FOIA. Such questions are appropriately addressed by the District Court in the FOIA litigation."
"For the foregoing reasons, EFF's motion is granted in part. The Court holds that FISC Rule 62 does not have the effect of sealing copies of the Opinion in the Government's possession and that the Court has not otherwise prohibited the Government's disclosure of such copies in response to the EFF's FOIA request. This Court expresses no opinion on the other issues presented in the FOIA litigation, including whether the Opinion is ultimately subject to disclosure under FOIA. Such questions are appropriately addressed by the District Court in the FOIA litigation."