Here's an interesting article from MSNBC.com about the difference where you live can make in the size of the gender gap in pay. Women may want to move to California where the demand for highly educated professionals is strong and where there is less discriminatory effect. The Northeast part of the US is another area where the gender gap is smaller due to the demand for skilled workers in the financial services area. Seattle, with its major corporations like Starbucks, Amazon, and Microsoft, and Washington DC, with its preponderance of government jobs, are also good choices for women seeking pay equality.
For another perspective on the pay equality issue, read Why Men Earn More.