You don't have to be a DVC member. We went last spring on a special Disney Visa rate of $159 per night (plus tax) for a 2 BR villa. I don't think there are any specials like that now. If you have a Disney Visa watch for special HHI rates that they offer a few times a year.
You sure can. You can find the hotel on Expedia and Travelocity. Or, call them directly. We are DVC members and went for the first time last summer, and are heading back in 2 weeks. It is a great resort!