Information suggests booking for HI will be for the fall or early Winter of 2011 but that it MAY be open for cash reservations a couple of months earlier than that.
Recent (unofficial) updates are indicating an opening of late spring or early supper 2011, so it could be as early as this fall, but remember that only the declared units are available through DVC so depending on sales and home resort demand it may be challenging at 7 months.