As promised, Emacs 24.4 RC1 was released on Friday. If all goes well, we’ll have the official release of 24.4 on Monday. There’s a lot of great improvements in the new release so, like most Emacers, I can hardly wait for it to be released.
Of course, if you really want to live on the edge, you can move directly to the new Emacs 25 development branch. I depend on Emacs and want it to be absolutely stable so I don’t want to be that far out on the limb. On the other hand, Lee lives in Emacs too and seems to be happy with living on the edge.