I think alot of people have a one way valve installed....but thats a bad idea IMHO. You want the crank case venting, ESPECIALLY @ WOT/high RPM...and that one way valve only allows for that under part throttle.
A. Put little breather on your valve covers
B.route the PCV lines into the powerpipe/inlet side of the blower, with an oil/water seperator inline before it gets the the blower.
C. Do the same as above but vent the line straight down towards the underside of your car.
A. will probably put a thin oil layer over everything after a while
B. Could put a thin coating of oil on your MAF (unless its after the MAF...but im not sure if thats a good idea)
C. Could over a long time put a thin coating of oil on the underside of your car.
Me? I went with C, and with no oil spereator...its a bit dirty under the car, but not bad at all.
Im not sure how bad it will be after the FI is complete though.
But theres no way im going to risk coating the MAF...that = LEAN as I have a blow through setup....I even went as far as not using any oil based air filters....I run HKS style foam filters.
They are the EXACT SAME as these...just cheaper off EBAY and say "mazdaspeed" on the center button instead of HKS.
http://www.nipponpower.com/product.phtml?p=79&i=1