The March 2008 issue of Fast Company has an interesting little feature called "The Journal-ist," in which author James Kuczmarski offers abstracts on articles from four academic journals. Each of the articles focuses on a skill or trait of "top-notch" leaders in the 21st century. The four skills are curiosity, charisma, understanding the physiology of the brain (!), and ability to adapt.
You can read the article online at http://www.fastcompany.com/magazine/123/the-journal-ist-in-the-lead.html.
And the librarian in me couldn't resist finding citations for the articles Kuczmarski references. So if you're interested in a bit more indepth reading on these topics, check out:
"The Role of Curiosity in Global Managers' Decision-Making""
Journal of Leadership & Organizational Studies, Vol. 13, No. 3, 43-58 (2007)
Michael Harvey, University of Mississippi & Bond University (Australia)[et. al.]
"The Two Faces of Transformational Leadership: Empowerment and Dependency"
Journal of Applied Psychology 2003, vol. 88, no2, pp. 246-255
Boas Shamir, The Hebrew University of Jerusalem [et. al.]
"The Neuroscience of Leadership" (available through ProQuest ERIC #:EJ778221)
Reclaiming Children and Youth: The Journal of Strength-based Interventions, v16 n3 p10-17 Fall 2007
David Rock and Jeffrey Schwartz
"Leadership Harvard Style" (available through ILL / see Article First)
Australian Journal of Public Administration, Volume 66, Number 4, December 2007 , pp. 507-511