Okay, guys, I got it working. Not sure exactly how. However, I have the basic steps:

• re-imaged Raspbian
• sudo apt-update, sudo apt-get upgrade, sudo apt-get autoremove
• reboot
• install latest versions of nodejs and npm (make sure they are actually up to date with --version)
• install electron from source (I believe I did this globally -g.)
• build MagicMirror from source (not using auto-install script)
• create your config.js file.
• RUN ELECTRON FROM CONSOLE (just type electron)
• cd MagicMirror
• now run sudo npm install && npm start.

This worked for me! Hopefully it will work for you guys too.

Edit: This also works without electron running. I think the issue comes when electron does not install properly?

Maybe use something like pastebin for verbose output? Just for thread readability.

Reinstalled the OS (Raspbian 8.0) and followed @KirAsh4 's install posts. Still fail at the electron install. Has anyone found a solution?

@MichMich I seem to be having the same problem as folks above. Whenever I try npm install from inside the MM folder, the electron installation either stalls or fails.