I edited a few pictures from the last few days using iPhoto for iPad and posted them to my Flickr. I took them using a Panasonic GF2, with a 20mm Panasonic lens. All of them looked slightly underexposed, especially the one of my guinea pig, and needed the white balance adjusted. The auto white balance feature using skin tones, or white points works great. This is one of the most impressive, and genuinely useful apps I've seen on the iPad yet.