My blower doesn't sound nearly as bad as what yours is, but i do have those same exact issues. I put a breather on my drivers side valve cover, and a oil separator on the passenger side just this weekend. No oil in either, so i'm assuming that oil is back in the powerpipe and i didnt' even his 1 pound of boost the whole time.
I jsut cleaned everything out, the car still is idling kinda funny... and i still have to hold the gas down and start it to get it running, rev it up a bit just to get it to idle... i haven't driven it into boost at all this whole weekend, goign to check tonight to see if more oil is in there. Is it possible, even with the cleaning, that the MAF is bad now?