This document discusses a proposed "Web Application Service" that allows for modular web applications based on OSGi. The service would parse a web.xml file to register servlets, filters, and other configuration for a web application across OSGi bundles. It aims to simplify deployment of existing web applications to OSGi. Currently taglib support, listeners, and security are missing but under development. The service follows the extender pattern and API to integrate with OSGi bundles and web containers. A demo is shown of deploying Tomcat examples as OSGi bundles using this approach.