http://www.vinesse.com/. Member login is on this page at the very top center of the page.

Exactly, they provide no info on doing that with your first shipment of wine. In my opinion they want you to delay a while so they can get another shipment out at full price.

I don't know about a website for members. I was sent an email from American Airlines Advantage to purchase wine from Vinesse and earn points. You would become a member and get specials on their wines. All I had to do was click on the email that I received from AA and it took me to a link.