New this week at Zazzle.com is the ability to create custom collections. I started exploring the options by creating a collection of pretty photos of the Northern Lights at Zazzle. Here is the link to my collections at Zazzle.
Customers and shopkeeper can both create lists. Brides will be able to create a custom collection of invitations and favors for their wedding party. You can create a Christmas wish list and share it via social media. Expectant mothers could create a collection of gifts she'd like for her new baby.
The affiliate link option is built into the social media share buttons, so I imagine that affiliate markers as well as shopkeepers will find use for this new feature at Zazzle.