FTP API and S3 API modules proposal

In the ongoing process of simplifying module development and reducing the duplication of effort, I'm proposing creating two modules- FTP API and S3 API. These modules will only provide these services and some configuration API. They will not provide a UI for the actual browsing and moving of files. I see the following functionality for each module:

• getting file list from specified directory
• getting file
• putting file
• setting file permissions
• global settings (user/pass, directory)
• per-user settings (optional)

These modules will provide the stream wrapper layer for compatibility with the Media module

What do people think? Any functionality that I'm missing?