WHATWG Weekly: http+aes URL scheme, control Referer, …
Apple's Safari team provided feedback to the Web Notifications Working Group. That group, incidentally, is looking for an active editor to address that and other feedback. Opera Mobile shipped with WebGL support. This is March's first WHATWG Weekly.
Simon Pieters overhauled much of HTML5 differences from HTML4 and the document now provides information on added/changed APIs, differences between HTML and W3C HTML5, content model changes, and more.
Ian Hickson introduced a new URL scheme named http+aes (and also https+aes) in revision 7012 that allows for hosting private data on content distribution networks. Revision 7009 by the way, added the necessary hooks for the DOM mutation observers feature to HTML.
A new "referrer" metadata name for the meta element has been proposed on the WHATWG Wiki. This allows for controlling the Referer header on outgoing links.