RockMelt a new Facebook / Social Web Browser based on Chromium, has been released as a limited public beta.
RockMel is cloud based and uses Facebook for authentication
“RockMelt makes the Web a personal experience. Because RockMelt is the first browser you log into, it unlocks your Web experience with your Facebook friends, your feeds, your favorite services, even your bookmarks and preferences. RockMelt is also the first browser to be fully backed by the cloud. This means you can access your personal browsing experience from anywhere, and you get quick updates from the people and sites that are important to you.”
RockMelt has been set up the founder of Netscape Marc Andreessen
Invite sign up at: http://www.rockmelt.com