Reply #11: Also drastically reduced executive privilege. Some more info and a link: [View All]

[Nothing Without Hope]

http://www.dailykos.com/storyonly/2009/1/21/15155/0396/330/687172
(snip)
... the President instructs all members of his administration to operate under principles of openness, transparency and of engaging citizens with their government. To implement these principles and make them concrete, the Memorandum on Transparency instructs three senior officials to produce an Open Government Directive within 120 days directing specific actions to implement the principles in the Memorandum. And the Memorandum on FOIA instructs the Attorney General to in that same time period issue new guidelines to the government implementing those same principles of openness and transparency in the FOIA context.
(snip)

This is only part of it. Read more, including restriction of executive privilege, at link.