I gotta say I was impressed by the little E-PM1. I'm willing to bet if you looked at my E-5 and E-PM1 pics from the wedding you wouldn't be able to tell which camera was used for each photo. There were a couple pics from the reception I didn't like the colors on for some people shots but I converted them to B&W and they looked fine. I even did a video of the surprise Dirty Dancing re-enactment by the bridge and groom. I didn't have the best angle for it but I thought the video turned out pretty well. I didn't use a tripod but there was very little camera shake so the image stabilization seemed to do a good job with the video.
Below are a few photos from the wedding. The rest of the photos, including those taken with the E-5, can be found here: Mario & Aimee