Amy Adams' nude scene was cut out from the Blu-ray version because of the aspect ratio used on Blu-ray disc. I got my hands on the European PAL version and her nude scene is still there.
I don't think it really matters which DVD version (PAL or NTSC) of Sunshine Cleaning you get to see Amy Adams topless. Just don't get the Blu-ray. I checked DVD details on Amazon for NTSC version and it also includes full frame version of the movie besides the widescreen one.
Here are some caps and a clip from PAL DVD of Amy Adams' nude scene, and one frame grab from Blu-ray for comparison. Video clip is of slightly higher quality than the one I already posted.
Amy Adams topless reduxYou can
buy Sunshine Cleaning on DVD at Amazon.