On top you can see the review of the new 45mm PRO lens. And here are some more tests:
Street Photography with the Olympus 17mm f/1.2 PRO (TheDigitalStory)
Hands-On Comparison of the Olympus 45mm f/1.8 and f/1.2 Lenses (TheDigitalStory).
Olympus 17mm F1.2 Pro sample gallery (Dpreview).
Olympus M.Zuiko Digital ED 17mm f1.2 (photobern).