A system and method for collecting and processing data over a communications network. A data mining marshaller module associates each plugin to a particular data source and manages the plugin to periodically retrieve unstructured data from the data source based on a plurality of data items to be monitored on behalf of a plurality of users. The plugins convert unstructured data received from the data sources to structured data and the data marshaller module stores the structured data in a database. This enables the system and method to aggregate and display the structured data in multiple graphical representations according to the user's preference.