A couple of recent articles from the IEEE on women in computing:

• "Deterrents to women taking computer science courses" by S. Beyer, K. Rynes and S. Haller in IEEE Technology and Society Magazine, v23i1 , Spring 2004.
  
• "Women and gender in the history of computing" by J. Abbate in IEEE Annals of the History of Computing, v25i4 , Oct.-Dec. 2003.