Scott Hodes writes The FOIA Blog; he caught this news when it happened in August, regarding Bloomberg's case vs the Federal Reserve Board of Governors:
In March of 2010, a three-judge panel of the United States Court of Appeals for the Second Circuit ordered the Federal Reserve ("Fed") to release to Bloomberg, plaintiff in the FOIA lawsuit, details of its emergency lending program it used in 2008. The Fed appealed to the entire court (for non lawyers, this is called an en banc appeal). The decision of the full court was recently made, and it affirmed the earlier decision of the three judge panel.
The decision hinged on an interpretation of Federal FOIA exemption 4. I haven't done enough Federal FOIA, especially enough to get into exemption territory, to give this more justice. You might look at the reporting from RCFP, the amicus brief, and the March appellate ruling for background on this particular step in the case, and my previous writing on Bloomberg vs Board of Governors for deeper background (that's for me and not just for you).