I stumbled onto this site, which offers a test of text to determine the gender of the author.
The categories are fiction, non-fiction, and blog entry.
I entered an entire blog entry (Dances with Squirrels), an excerpt, and a few sentences randomly generated from my own head. My kids shouted things to type in and even [My Attorney] played.
Our results? Ok, first of all this test is surely flawed. Despite the rigorous science behind its generation, it's just wrong. Wrong. Wrong. Wrongity wrong wrong.
[My Attorney] -- Female.
The Girl -- Female.
The Boy -- Male.
Me. The Dad. Your bloggist. A manly man type man of a man. -- Female.