So apparently there was a Ron Artest sighting today. I guess he forgot to take his crazy pills this morning.
I don't know... it obviously was a bad hit but I think he should be suspended for < 5 games. He never made eye contact with Harden, so it seemed more like a flash-anger hit. It was more reckless than premeditated. For example Bynum's hit on Barera last year was clearly premeditated. Metta's elbow was reckless in comparison.
That said, an elbow to the head is very dangerous. You can't fling your elbows above your shoulder precisely because you can do serious damage to someone (concussion, broken nose, and etc).