Then let us with the backward Muslims. Why backward Muslim men pray at a separate room? This is totally unfair.
We discussed the separation issue in different threads in Islam Forum:
http://www.religiousforums.com/forum/islam/58638-women-masjids-2.html#post985692
http://www.religiousforums.com/forum/818074-post7.html
Why would a woman lead men in the prayers?!! Basically the prayer of the Muslim woman at her home is better than praying at mosque, but at the same time the prophet warned against preventing women from going to the houses of Allah.
I would hate it if I knew that men can see me while I am bowing and prostrating...etc. they will see parts of my body and positions of me I as a Muslim women won't like them to see. That's why women pray behind men, to preserve and guard their veil.
When the Muslim recites the Qur'an, it's called tarteel, they try to sweeten their voices, there is a kind of tune while reciting the Qur'an and the Imam's vioces are usually sweet.
I don't doubt that if women were allowed to lead men in the payers, the issue would turn into chaos...."man the imama in this mosque is hot, lets go there..."
The mosque is a place of worship, remembrance of Allah, the place has its dignity and modesty. Men have their lines and women have their lines and between them children's lines.
A woman leads other women is fine.