Node.js version 6.3.0 is now out with a couple of minor improvements/fixes over 6.2.2 (npm bump, a couple of REPL tweaks (one being that Ctrl-C/SIGINT no longer kills the Node instance, but instead tries to abort an iloop), an extra configuration option for the debugger, streamable.read() performance increases). No hurry on getting it into the tree, but eventually it might be nice.
6.6.0 is in the tree.