The customer content operations available in Amazon E-Commerce Service (ECS) allow you to search for and view customer-created content such as wish lists, Listmania lists, product reviews and any of the "About You" information a customer may have contributed to Amazon.
The CustomerContentSearch operation will return Customer IDs in its response, but if you are not using CustomerContentSearch in conjunction with CustomerContentLookup, you may need to go to an Amazon Web site to find a Customer ID (if it is available). The following URL shows you where to find the Customer ID from a member page.
Customer ID
In this URL, the cutomer ID is A2KEKKJ9CAC2KC.
http://www.amazon.com/exec/obidos/tg/cm/member-glance/-/A2KEKKJ9CAC2KC/