I don't know how long your site has been down, but getting that up and available might be helpful. People are so technology focused anymore that they love to be able to visit a website and get information. The address below is the website for my undergrad school's Greek Life, in the lower left is a quick web presentation of sorts. It goes along with all of their slicks that get sent out to all incoming freshman and transfer students in the spring. They also have a mailing that is sent to parents that fields general concerns and promotes Greek life - i.e. Greek students have a better grad rate. They were using a company based in Ames that some other midwest schools were using, but I don't know if that's still the case.
http://www.greek.iastate.edu/
Does your Orientation have a fair of sorts where people can walk through and check out the different student organizations? That's when a lot of women and men interested in going through talk to someone about Greek Life and sign up for house tours.