I don't believe that the site will allow you to pre-order, but you could have pre-readers email their names / addresses to you, and then you could order on the first day of issue for each of them. How they would pay you would be a concern. They could snail-mail a preorder to your PO box, with check or money order; alternatively, you could bill each of them with delivery and let them pay net-15.
You could also require payment by paypal on all pre-orders by email; that would work also.
Just some suggestions. I haven't tried any of these things.