You guys were right - it is 100% leased. From the Downtown Partnership:
During re-dedication ceremonies last week, developers of the Old Post Office announced that it is 100% leased, a great milestone for this very important building that was essentially empty for so many years. Speakers emphasized the spirit of bi-partisanship, especially at the State level, that sustained the project since pinpointed as a downtown revitalization key in the Downtown Now! Plan.
