eMarketer does a nice job rounding up demographic data and comparing total population with Internet population:
As of 2006, 63% of the US population ages 3 and older uses the Internet at least once per month, according to eMarketer. That amounts to 180 million people.
Here’s the other chart of particular interest to me:
Women Internet users total 92.6 million, and 87.5 million US Internet users are men. Women make up 51.4% of the US Internet user population.
Here’s my post from yesterday on the rise of the Mom Networks.