If you have a gazillion photos hosted on Flickr.com, then this might be a nifty idea for you – how would you like to have your Flickr photos automagically display as your desktop wallpaper? Well, look no further as this tool, called Webilder, will allow you to do just that. For a more detailed instruction, check out this blog entry.
Personally, I do not see myself doing this but I think this is a good idea for your kids' grandparents – at least they get to see their grandkids as wallpapers on their computers.