1. A method performed by one or more computing devices, the method comprising: receiving feedback information providing an assessment by a particular user of a particular program feature from at least one particular comment made by the particular user at a shared forum maintained by a network-accessible computing system for receiving, storing, and presenting comments by forum users, the comments being organized into a plurality of idea categories; storing the feedback information in a user feedback profile associated with the particular user in a data store; determining a modification to be made to the particular program feature based at least on the user feedback profile, the determining including automatically interpreting the at least one particular comment based at least on a linguistic content of the at least one particular comment, the automatically interpreting including identifying at least one particular idea category associated with the at least one particular comment; making the modification to the particular program feature to produce a modified program feature, the making including applying at least one modification rule associated with the at least one particular idea category, the modified program feature producing a modified user experience when the particular user interacts with the modified program feature using a user computing device; and notifying the particular user of the modification to the particular program feature, wherein the notifying comprises choosing a timing at which to present a notification to the particular user, and/or choosing a method with which to present the notification to the particular user, based at least on one or more notification presentation rules.