Request for an application

I’ve got an idea for an application. If you have nothing to do or looking for an idea to practice your mad programming skills, feel free to use this one.

Flickr is an excellent source of images. Better even, all images are tagged and most are available in different sizes. It would be very nice to have a tool that could use Flickr images as desktop backgrounds (wallpapers). Ideally, I would just specify the tags that I am interested in, such as sports, nature, or landscape, and this tool would get the list of images from Flickr that are available in the resolution that I am using. Images could be random or sorted by some criteria, such as posted date or number of comments. If there would be a preview and an easy way to change to the next image (maybe even automatically based on time period) I’d be totally happy.

I don’t see myself programming this anytime soon as I don’t care much for desktop candy. But if one was available there is a chance that I would use it. I also know of a few people who would simply love something like this.