Apple's WebKit development team announced Thursday that the WebKit2 framework will begin rolling out.
From Apple programmer Anders Carlsson:
Apple's continued development of WebKit is a good sign as the company continues to push for Internet standards by developing the open-source engine responsible for Safari, MobileSafari, and several Web-based applications. By implementing the Chrome-like split-process model, WebKit2 allows any application that uses the technology to be protected from processes that crash within Web sites. The easiest example, as in Chrome, is when a site crashes in the future WebKit2 browser, only the tab that contains the crash needs to be attended to. All other tabs remain stable and active. WebKit2 should be suitable for testing very soon. You can check out high-level documentation here.