Now then. When I clicked the select button to select my primary address, this opened up another page that said:
Wishlist
Thank you for updating your shipping address
Select your primary address...
Because I saw the "Select your primary address" heading first (since it's in a larger font than the "Thank you" text), I thought that my address selection hadn't worked and that I had to try again. It took me a few moments to realize that my selection had been successfully made and that I was now able to start using the wishlist functionality.
So perhaps you might consider adding another line or two to the effect of, "Now enjoy creating your wishlist!" or "Return here at any time to change your selection of primary address". Just to make it nice and obvious

When I began browsing through the teas, it became obvious how the wishlist feature works. For those who haven't seen it yet: as mentioned on the introductory page, there is a wishlist button next to each tea, and each size that is available for that tea. I really appreciate the latter fact, since I often want the opportunity to try a 2-oz sample before committing to a larger one. I also like the mouseover effect on the wishlist button (it turns into a cross), along with the somewhat more subtle arrow that appears under the corresponding product in the photograph above. Very nice indeed!
Improvements? It would be nifty to have some Amazon-style wishlist features, e.g. the ability to set a priority on a wishlist item (ranging from High, which for me would be "I must get this on my next order!", to Low, which would be more akin to, "Order this at some point, but, no rush"). The other Amazon wishlist feature I quite like is the Add to Cart button. Clicking this button on Amazon doesn't remove the item for the wishlist automatically, which means - if Adagio adopts a similar feature - that I can keep my permanent favourites always available to me on the wishlist.
One other thing that would be nice, IF possible... a spot to post a comment on each item in the wishlist. How nice would it be to have a place where we can make such notes as "Keep this one in stock forever!", "If you buy me one tea, Dad, make it this one"; and "Get this one as a Christmas gift for Melody, she will love it!"
I do recognize that these might require a lot more code, and they aren't essential by any means. If I could have one new feature, though, it would be the ability to add comments (or to select a priority if commenting isn't doable). This would be a big help to family and friends browsing the list in search of potential gifts.
P.S. And I think someone already mentioned it, but - it would also be very cool to have the prices displayed on the wishlist, too!