“As was indicated in its governmentwide policy guidance issued under Executive Order 13,392 — see FOIA Post, Executive Order 13,392 Implementation Guidance (posted 4/27/06) (noting, in footnote 2, prospective treatment of improvement plans and annual FOIA reports alike) — the Office of Information and Privacy has established a special location on its FOIA Web site for the consolidated posting of all agency FOIA improvement plans prepared under the Executive Order. These plans can be accessed through the new “navbar” entitled Agency FOIA Improvement Plans Under EO 13392 that now is contained on OIP’s FOIA Web site.”