Honey-
http://www-scf.usc.edu/~gogreek/
that's the link to USC's Panhellenic website. Its a bit out of date, but you can get an idea of the type of Rush and the houses there. Call the Panhellenic office for an application, with questions, etc. I graduated 10 years ago, at that time Rush was a week long and very competetive. I understand USC has now cut Rush down to 3 days.
Good luck!
Amy