These boards have been a valuable resource all through nursing school. School can teach you facts and skills, but I think it takes thoughtful discussion with other nurses to learn what it means to be a nurse. You can get that from classmates, instructors, staff nurses in the clinical setting, and in many instances from nurses you know and/or work with, but allnurses puts you in touch with a wide range of views from nurses all over the world.
It's also not a bad way to unwind a bit when your brain glazes over from careplanning, or to find a bit of encouragement when it just seems like too much. I think it should be a required activity for nursing students, and I have been recommending it to everyone I know.