Now Lambda support works "out-of-the-box" if using below combination of software
Oracle JDK 8
http://www.oracle.com/technetwork/java/javase/downloads/index.html
Glassfish from 4.01 branch
http://dlc.sun.com.edgesuite.net/glassfish/4.0.1/nightly/latest-glassfish.zip
Eclipse 4.4 Luna
http://www.eclipse.org/downloads/ (pick the java ee package)