Integration Google Docs system with our project mng. system

We are using dotProjects to manage our internal projects. And google docs for document management. We want to couple these two systems. On google docs we want to have function forward this to "dotProjects". In this way we want to attach that document to a project or task of a project. On the other way, when we upload a document on dotProjects we want to upload it to the related folder on Google docs. Link: [login to view URL]