To see something like this in action, this HTML Mail.app clone demo (that I'm pretty sure hit the HN front page several months ago) uses data URIs for all its i

To see something like this in action, this HTML Mail.app clone demo (that I'm pretty sure hit the HN front page several months ago) uses data URIs for all its icons: http://ukijs.org/mail/index.html http://ukijs.org/mail/index.html