we are relocating from Florida to Fargo and have been looking at rentals too. Fargo forum has new listings everyday but I have also found some other sites which have been helpful;
www.rkakrentals.com and oodle.com will actually send you email alerts when a rental with your selections come available. With oodle you must go to their web site and make your preferences and city you want and sign in your email.
LOL