First look: how does the new Olympus 17mm f/1.8 perform in terms of distortion, vignetting, sharpness, color correction? On the Olympus OM-D E-M5.
A full aperture series from f/1.8 through f/11 for the Olympus 17/1.8 is presented in Guide to Mirrorless.
I shot some other material also, including some comparisons, but it turns out to be terribly hard to focus-match between lenses with the E-M5 (just way to difficult to tell where proper focus actually is), making defensible comparisons quite difficult to do.
B&H Photo has the Olympus 17mm f/1.8 for about $499.