I agree Carol, he sure was the best official in the CCHA.
Here's a link to the announcement:

http://ccha.cstv.com/sports/m-hockey/spec-rel/060707aad.html

Carol S. White wrote:
 > Seen on another message board:
 >
 > CCHA ref *Steve Piotrowski* is retiring from on-ice officiating to 
become the CCHA's director of officials effective immediately.
 >
 > Sad day, I have always thought he was the best referee I've ever 
seen.  Maybe he will teach all the refs in the CCHA how he became so 
effective. (I wish we had a great ref like Steve, running the WCHA!)
 >
 > Carol