Okay, as discussed, my engine lost a lot of oil somewhere, and it has yet to be identified. I changed my oil last night, and have been keeping an eye on it regularly. Nothing seems out of the ordinary...
But I did remember this thread, and decided to pull my PCV hoses off again. They were again covered in oil all the way through, as was the valve. So I took Mark's advice and bought a OEM PCV valve from the dealer. I took all the PCV hoses off and sprayed them out with brake cleaner to remove all the oil residue, then reinstalled them with the new PCV valve. I did notice a very slight improvement in the idle afterwards...
That was Friday, and I pulled the top hose off again. There was a very slight bit of residue on the valve, it might have been leftover brake cleaner, not sure. But so far the hoses are bone dry, no oil.
So I guess what Mark was saying is that aftermarket PCV valves allow way too much intake vacuum to pull the air through the PCV system, and some oil too, for that matter. This might also explain the slight idle improvement, although that doesn't quite make sense since the PCV system is closed to the atmosphere
Anyway, I too second the OEM PCV valve. Aftermarket ones pull too much vacuum.