I do not know the test way to learn about the new features, but the news file that comes with Emacs lists all important changes. It is available under the Help menu in Emacs and you can alos find a link here http://www.emacswiki.org/cgi-bin/emacs-en/EmacsCVSFeatures.
S. Z. Montsaroff wrote:
What does the beta provide and where can one get it?
