1. A method for simplifying user management of products during online shopping, comprising: displaying an informal storage space for a merchant's web site when web pages from the merchant's web site are displayed, wherein the informal storage space comprises visual identifiers for products that are currently added to the informal storage space; permitting users to compare the products that are currently added to the informal storage space; permitting users to make modifications to the informal storage space; and updating state information for the informal storage space to reflect the modifications made to the informal storage space.