Do you agree with Harvard's move to sanction single-sex campus groups?

Harvard has not outright banned single-sex fraternities and other student associations, but they have instituted “sanctions” to try and discourage students from joining them, such as not letting members of these groups be captains of sports teams or receive certain scholarships.

Naturally the fraternities and sororities are suing the school.

Is Harvard’s move a step in the direction of gender equality? How valuable are single-sex student associations?