The Web Hypertext Application Technology Working Group (WHATWG) is working jointly with W3C on developing the HTML 5 standard, which has been at "Last Call" at WHATWG for the last 3 months. During this time one feature which has changed more significantly is the sandbox attribute of the iframe element. sandbox can be used to isolate untrusted web page content from performing certain operations.
Google Chrome’s latest additions are: Chrome Beta for Max and Linux, Extensions for Windows and Linux, and Web Sockets.
Google is offering two DNS servers for public use, namely 126.96.36.199 and 188.8.131.52, in an attempt to further speed up browsing.
Both IE and Mozilla teams are currently working on using DirectX/GPU for page rendering while Google is considering it.
Google proposes SPDY, a new application protocol running on top of SSL, a protocol to replace HTTP which is considered to introduce latencies. They have already created a prototype with a web server and an enhanced Chrome browser that supposedly loads web pages twice as fast.
Google has just released an Internet Explorer plug-in called Google Chrome Frame that enables Chrome rendering inside IE. That means that any page targeted for Chrome Frame will be rendered using Google’s rendering engine, including HTML 5 elements supported by Google, while the page is viewed with Microsoft’s Internet Explorer.
Phoenix Technologies has created HyperSpace, a small OS that supports only browsing. HyperSpace precedes Google Chrome OS which is supposed to offer the same functionality with some differences.
Google has announced they are working a new operating system called Google Chrome OS. Based on a Linux kernel with a new windowing system, the new OS is targeted at netbooks first and will be open sourced and free.
A Microsoft Research team led by Helen J. Wang has created Gazelle (PDF), a browser-based OS, with the declared intent to tighten security when going online.