When Leslie Murphy ascended to chairwoman of the American Institute of Certified Public Accountants (AICPA) in October, she pointed to the looming shortage of public accountants as a serious challenge facing the profession.Added pressures stemming from compliance with the Sarbanes-Oxley Act is causing strife and turnover, creating an environment in which one in six CPAs left his or her job in 2004, she said during her inaugural speech.But despite the challenges, Murphy remains upbeat about the future, as more college students are seeking the profession as a career, she told AccountingWEB