From their Facebook page:
Later this evening and/or tomorrow, the OBi100 and OBi110 will be available at Amazon.com.
We have implemented a separate coupon code for each product, which will be required to arrive at the $43.99 & $49.99 price for the OBi100 and OBi110, respectively. Up to four (4) units of each model may be purchased at a discount by an individual Amazon customer. The coupon codes may be used one time and one time only by an individual Amazon customer.
Coupon codes and offer descriptions:
OBi100
OBi100 Coupon Code: HELLOOBI
For a limited time, up to four (4) OBi100 units may be purchased at $43.99 or $16 off the Obihai Technology list price of $59.99. The regular list price of $59.99 will apply to all subsequent purchases of the OBi100 by the same customer.
OBi110
OBi110 Coupon Code: GREATBUY
For a limited time, up to four (4) OBi110 units may be purchased at $49.99 or $20 off the Obihai Technology list price of $69.99. The regular list price of $69.99 will apply to all subsequent purchases of OBi110 by the same customer.
In summary, any single Amazon customer will be able to buy up to four (4) units of the OBi100 at $43.99 and four (4) units of the OBi110 at $49.99.
As with any Amazon.com coupon code, customers will apply this to items in their shopping cart at checkout.
In the Amazon.com, "Review and submit your order" area you will see an area on the right titled, "Do you have any gift cards or promotional claim codes?" There is a window below this, which allows you to apply the coupon code(s).
Should you have difficulty applying the coupon code, you may need to remove the item(s) from your shopping cart and shopping history, then add them and apply the coupon code(s) again.