Google Plus - After automatically uploading photos from your phone, the option to share those photos is appended to the camera icon in the Status box.
/via Peter Gasston
Google Images – When dragging a photo on the page or into the browser, the search input changes to support drag’and’drop.
OS X - The print queue icon matches the actual make and model of the printer/copier you are printing to.
Twitter - In iOS 5, attachments are aligned so that the scrollbar just fits between the view border.
Pixelmator - The “Open recent picture” on the start screen of Pixelmators displays the actual last opened picture right in the icon (see the image in between the brush and the wooden board).