After campaigning vigorously against President Bush's signing statements on bills, Obama has done the same on five bills he signed

A discussion of the broken promise is here.

March 11 -- Omnibus Appropriations Act -- Obama objected to five aspects of the bill, including a whistleblower provision and several items on foreign policy.
March 31 -- Omnibus Public Land Management Act of 2009 -- "Because it would be an impermissible restriction on the appointment power to condition the Secretary's appointments on the recommendations of members of the House, I will construe these provisions to require the Secretary to consider such congressional recommendations, but not to be bound by them in making appointments to the Commission."
May 20 -- Fraud Enforcement and Recovery Act of 2009 -- Obama asserted that he reserves the right to prevent an administration official from testifying before the Financial Crisis Commission – which is congressionally appointed but is not an arm of Congress itself – on matters the Obama administration considers privileged.
June 2 -- Ronald Reagan Centennial Commission
June 26 -- supplemental spending bill -- this bill "would interfere with my constitutional authority to conduct foreign relations by directing the Executive to take certain positions in negotiations or discussions with international organizations and foreign governments, or by requiring consultation with the Congress prior to such negotiations or discussions. I will not treat these provisions as limiting my ability to engage in foreign diplomacy or negotiations."