Oh yeah, it's mostly Orthodox men who wear tefillin. Some Jewish women wear tefillin (mostly not Orthodox) but that is fairly rare. The tradition for women to wear tefillin comes from the daughters of the 11th century French Rabbi Rashi - who tradition says wore tefillin. So some women rely upon that.
According to the letter of the law, tho, only men are obligated to wear tefillin. Women, according to the Torah, aren't obligated in commandments that must be performed in a specific time frame. (And like I said above, tefillin are supposed to be worn in the mornings.) Sorry if this is getting overly complex.
― Mordy, Monday, 18 August 2008 21:47 (fifteen years ago) link