What concerns me about all of the responses to date is the pathetically narrow view of the "business side" of an institution. The "business" of museums encompasses more than the finances of the organization. Director's must also be adept at using managment tools to understand and motivate employees and trustees, to make the organization run as efficiently as possible on those ever ellusive funds, and know how to market and "sell" the institution to funders and the general public. A director can always learn the ins and outs of a museum's collection from the curators. Based on my experience in museums, it is much harder to find those within the museum community who can teach a director how to be a great manager.