[coverband]

All those use cases and more can be accomplished if the Write API is limited to a sandboxed local storage with a configurable size limit per domain. I would hate to see all the gains made by sandboxing the browser fly away by allowing it to access any file on the user's system.

[nicoburns]

I think the idea here is that you'd whitelist files/folders on your actual filesystem for use with the app. This sounds fantastic for me. There's so many useful web based tools that are a pain to work with because you have to manually sync files to and from them.