Anybody who wants to know how finger length is connected to homosexuality should pick up the latest issue of Psychology Today.

The article is about how exposure to higher levels of testerone in the womb (which has already been linked to homosexuality) affects the length of your fingers in relation to one another. Typically, men have longer ring fingers than index finers. In women, these two fingers are usually about the same length, or the index finger might be slightly longer. A study showed that young boys with more feminine hands with more sensitive and little girls with more masculine hands were rowdier and had trouble relating to their peers.

Finger length is most related to homosexuality in women.

Here's the first few paragraphs of the article, at PT's website:
http://cms.psychologytoday.com/articles/pto-20050614-000004.xml