To catalogue the notifications summit content, I added this blog post:
Of note only one year later the browser manufactures have added or are in the process of adding support for off-line web app downloads to the browser cache. Additionally Chrome has added notifications. To see this working now visit the following site www.gdgseattle.org the demo works on Chrome desktop, tablet or mobile (Android). Only recently are the off-line features being added to webkit (Safari is assumed).