Google has developed their own web-browser based on the Webkit engine called, Google Chrome. You can read intro comics about it here: http://www.google.com/googlebooks/chrome/index.html
In introduces the "V8 Javascript" engine and separates tabs and scripts down into their own processes and puts everything into a sandbox.
This automatically means: safer, more reliable, and faster web-browser.
The beta is set to launch on September 3, 2008.