Yep, it's the PCV, but likely it's just the hose that connects to it. I did the exact same thing you've described - gettin on it then finding oil on the pass valve cover. Mine also spit out a bit of smoke when sitting at a light (until I cleaned up the oil) - that really scared me.
OK, what I did to cure the problem, after ensuring the PCV still rattled (telling me it wasn't faulty), is to put a simple hose clamp on the hose that connects to the PCV - problem solved! If te hose is REALLY worn, you can buy a new one, but I'd suggest just getting generic hose and cut it to the length you need.