From the website:
It's the beginning of the week AND the beginning of a new product line being in regular rotation!
Sentinel Tactics has been shipped to the retailers and distributors who support us (just so you know, we LOVE our retailers and distributors! Support your friendly local gaming store!) along with promos! Some stores will already have copies in hand and on shelves by now, whereas other are just now getting their games or will be getting them soon! As a result, we're ready to put them on our own webstore.