15. A computer-implemented method, comprising: causing the generation, via a first computing device, of an electronic commerce computer system, a first user interface through which buyers place orders over the network with a merchant and view the status of such orders, wherein generating a first interface includes: a displayed first portion including at least a subset of the negotiated terms between a buyer and the merchant for an accepted order, and a displayed second portion including: a message field for a buyer to generate and submit to the merchant messages that are linked to particular orders, and a display of at least a subset of a record of at least one message previously exchanged between the buyer and the merchant linked to the accepted order, wherein the at least one message is separate from the negotiated terms between the buyer and the merchant for an accepted order; and causing the generation, via a second computing device, of an electronic commerce computer system, a second user interface through which the merchant views accepted orders, order-specific messages from buyers, and status information of accepted orders, the second interface including a message field for the merchant to generate and submit messages to the buyers that are linked to specific accepted orders.
15. A computer-implemented method, comprising: causing the generation, via a first computing device, of an electronic commerce computer system, a first user interface through which buyers place orders over the network with a merchant and view the status of such orders, wherein generating a first interface includes: a displayed first portion including at least a subset of the negotiated terms between a buyer and the merchant for an accepted order, and a displayed second portion including: a message field for a buyer to generate and submit to the merchant messages that are linked to particular orders, and a display of at least a subset of a record of at least one message previously exchanged between the buyer and the merchant linked to the accepted order, wherein the at least one message is separate from the negotiated terms between the buyer and the merchant for an accepted order; and causing the generation, via a second computing device, of an electronic commerce computer system, a second user interface through which the merchant views accepted orders, order-specific messages from buyers, and status information of accepted orders, the second interface including a message field for the merchant to generate and submit messages to the buyers that are linked to specific accepted orders. 16. The method of claim 15 , wherein the first and second interfaces comprise web pages served by a common host site.