Who donated millions to Leon Panetta's foundation?

Debbie Schlussel raises excellent questions about the source of CIA Director-designate Leon Panetta's source of income for the last several years, the Leon and Sylvia Panetta Institute for Public Policy. According to records, the tax-exempt foundation has raised millions, but the identity of the donors has not been revealed. As Debbie points out, ecen Bill Clinton has disgorged the records of donors to his foundation.

Shouldn't we know who are the donors that have paid the salary of the next CIA Director?

Hat tip: Ed Lasky