I downloaded and tried out Chimera 0.2, the latest build of the Mozilla-based Web browser with a Cocoa UI and Unix back-end. They write: “The plan is to produce only a browser (no other apps!), and to keep the UI as simple and as clean as possible.”
So far so good. No one claims it’s ready for daily use yet, but if they continue on this path, there’s a good chance it will eventually be my browser of choice—probably alot of people’s browser of choice.