I just found the following interesting facts compiled by Women Who Tech, which incidentally is hosting a Tele-Summit on Women in Technology on March 31st, 2008.

Top 5 Cities Where Women Work in IT

• Washington, DC Metro area - women account for 32.3% of the IT workforce.
• Detroit - women account for 31.5% of the IT workforce.
• Baltimore - women account for 28.6% of the IT workforce.
• Philadelphia - women account for 28.2% of the IT workforce.
• Atlanta - women account for 28.2% of the IT workforce. Source: U.S. Census Bureau, 2006 American Community Survey

Interesting Facts

• 2% of open source developers are women. Source: 2005 O'Reilly Open Source Convention
• Women account for 28% of the workforce in proprietary software. Source: FLOSSPOLS, 2004-2006
• Women who earn B.S. degrees in Computer Science: 28%
• Women who go on to get PhD: 16.5%
• Women who held professional positions in the IT industry in 2006: 26% Source: Anita Borg Institute, 2007
• Teen Girls Have Access To Computers Later Then Teen Boys:
  • Age of first computer use: Female: 14.5 Male: 12
  • Age of first computer possession: Female: 19 Male: 15 Source: FLOSSPOLS, 2004-2006