8. The method of claim 1 , wherein for a particular one of the confirmation messages associated with a particular merchant, the sending comprises sending a request comprising the query to at least one network address that triggers at least one server network node to query records of products offered for purchase by the particular merchant.
9. The method of claim 8 , wherein the sending comprises automatically, by one or more of the computing devices, entering the query into a graphical control element of a web page generated by a web server associated with the particular merchant, and the at least one electronic document comprising the respective dynamically generated ranked list of product-related items is served in a web page by the web server associated with the particular merchant.