.. but the implementation is very buggy at this point. So buggy it ought to be labeled beta. Before it does anything (show a tab, hide a tab, create a tab, whatever), all the little tabs briefly hop up in the air. It's like having mexican jumping beans on your desktop. Except for every once in a while, the tabs hop up and then just stay there. Then it's like having decapitated mexican jumping beans on your desktop. I have been messing with the preferences for about an hour trying to get it to stop these antics to no avail. Deleted the plist to start over, but this behavior is present out of the box on my system, including on a vanilla user account. I would keep trying, but I don't want to start smoking again.