"Data hosting/sharing service" or "Data Marketplace(buy/sell data)". Allow users to upload data on your website and make it available to others for use in various formats such as csv,xls,xml,sql,json or expose data to be used through REST API.
You can later extend it by allowing users to share js/php/etc code snippets that does some operation on data or that handles presentation of data. Widgetize it so that it can be embedded on web pages.
