Browse by Dates and FOC
You can browse by either new release or FOC dates. New release browsing lets you see what was released on any given week. This is just a list of everything that was offered, and not a listing of what the store has in stock.
You can also browse by FOC date. FOC's are "Final Order Cutoff" and it's a system that is in place to ensure a store can order enough copies of a comic, it usually is set about 3 weeks before release date.
All titles in the subscription lists must be ordered before the FOC cutoff to ensure that your store is able to get copies for you.