Looks like the link wookie posted is live already. I'd just use that one.
As msm0511 said use the promotions link that was posted.
If you are trying to order the $99 bundle promo - please post your experience getting this here -
http://forums.androidcentral.com/samsung-galaxy-s8-and-s8-plus/790753-registration-immersive-gear-vr-experience-99-how-did-go.html#post5768212
Because some of us are having trouble "buying" this promo with no confirmation of it going through, so far.