I tweeted you a bunch, but let me know if you have other questions; it'll be easier to post in here than on Twitter! I never did the Greek thing, and most of my friends didn't either, so I won't be much help with the frat stuff, but I can give you some creepy roommate stories and other dorm info if you need it.
Not sure about marine biology either, but if you want more general info about classes/science lectures and labs, I've been there, done that.