Exactly. I'm not the kind to flip my lid when I don't get an answer, but people get busy and that leads to unanswered pm's. An away could help us realize that. Even a simple autoreply option like "I will be away til the xth, please understand pm responses will be delayed until then" would be nice.
New stuff added on COMC today (Monday 8/18/14)! Feel free to take a peek!