Harvard Business School's Working Knowledge newsletter for February 13 has an enlightening article about gender differences that show up during negotiations. The gist of the article is that gender "is not a good predictor of negotiation performance, but ambiguous situations can trigger different behaviors by men and women."
By "ambiguous situations," the authors are referring to situations where "the opportunities and limits of the negotiation are unclear." They go on to explain "how to neutralize the differences and reduce inequities."
For more down-to-earth advice on how to handle any negotiation, read the fascinating and useful book "The Shadow Negotiation - How Women Can Master the Hidden Agendas That Determine Bargaining Success." Tom Peters' testimonial: "Negotiation is a ubiquitous issue in the professional world, and the authors provide brilliant analysis and advice. Though this is an avowed book for women, I gained greatly from my tour of these pages. Well done!"
I found it to be very practical as well as a great read.