I can't say much more than they are shooting Grimm in Portland, and a couple Portland studios are doing the effects for it. Here's a couple articles on the pilot getting greenlighted and some of the cast.
http://www.nwcn.com/news/oregon?fId=118546069&fPath=%2Fhome&fDomain=10202
http://www.tvline.com/2011/02/grimm-news-pilot-adds-prison-break-alum/
http://scifi.about.com/b/2011/03/04/cast-added-to-grimm-pilot.htm