Application to connect SQL Server to Magento E-commerce site

I need an application that will push the products in my local SQL Server database to my online store running Magento. This application should run on a trigger, meaning when I web-enable a product, all relevant information for that product should immediately be made available on the E-commerce site. The application must recognize stock levels locally and remove any item from the website when becomes out of stock locally. The application must be able to create categories and sub-categories as needed, and must remove them (or disable them) when no products remain in that category. The application should only communicate with the website when new products are available, or when there are changes to any web-enabled items (price changes, image changes, etc). This project is only open to programmers with firsthand knowledge of SQL server and Magento.