Save without prompt in a Chrome Packaged App

Question

I have started to look in to Googles Packaged Apps in Chrome, http://developer.chrome.com/apps which seems to be a great technology, but in an early stage.

My quest

Answer 1

It looks like you will soon be able to do this -- see https://groups.google.com/a/chromium.org/forum/#!topic/apps-dev/fu1TyjdYLEc