Helen Boyd's blog alerted me to this NY Times article concerning "Muxe," i.e., Mexican "men who consider themselves women and live in a socially sanctioned netherworld between the two genders."
"In Juchitan, Mexico, daughters are more valuable than sons. So mothers are encouraging their boys to become girls." from Marie Claire, March 2007
You can read more about Muxe here and here and view a video here.
(In my humble opinion, the Marie Claire article is much more revealing than the NY Times article.)