Desktop Posters downloads images from flickr's extensive photo library and displays them on your desktop's background, bringing your desktop to life with interesting photos of the day, or photos related to keywords you choose. Think of it as a wallpaper changer with an endless supply of high quality images.
If you want to download random photos from you favorite flickr photo set, or group pool, you can do that too if you know the associated ids.
Desktop Posters lets you choose how often your background is updated, or you can change the background at anytime by clicking the Change Poster Now button. It also displays the url of the current displaying photo, so you can always find who took that great photo.
For those with two screens, it's possible to choose that the posters be displayed only on the main screen, on the 2nd screen only or on both screen.
The application's dock icon also shows a preview of the current poster, so you never miss out on that interesting photo!