We need a image of the day/week plugin + widget that has a admin page to enter the images and urls where they should link too.
functionality of the plugin/widget:
We add the images at the plugin admin page, the date it should be published and the url the image should linked to when clicked. If there is no images for that day then it should show the last image available. Also the images should be resized to the format set up in the settings. Links should open in a new window.