Today, as has been all over the news, including the NY TImes, Google announced, and released the first Beta of their new Open Source Browser, Chrome. Not only that, but they released a 36-page comic book about what they're trying to do with Chrome, which frankly I thought was worth reading. In fact, I read the entire thing before I downloaded the new browser.
What Google is trying to do here is admirable, they're trying to reinvent the way we interface with the web, and they're doing it in the Open, with a license that can benefit proprietary browsers, and they've done it with that undeniable Open Source demand to "Show Us the Code!" Admittedly, Google is only distributing packages for Windows at this moment, but the browser will build on Linux and Mac OS X (it may not work 100% yet, though), and work is underway to fully support those platforms.
Oh, and the ability to drag a tab between windows. That feature is awesome.
Chrome is impressive, and I'd suggest checking it out. For many users, it's likely the better browser. And I really hope that the Firefox people take notice and integrate the good parts of Chrome in with their extension framework. Frankly, I don't even care about the whole WebKit vs Gecko debate, they're practically interchangeable in my mind. But there is no competing with V8.