If you use iPhoto and Flickr then you might find PhotoCopy an extremely useful utility. PhotoCopy lets you combine iPhoto's ease of use with the great sharing features of Flickr.
Now you don't have to choose between storing photos in iPhoto or Flickr because PhotoCopy makes it easier than ever to share your iPhoto library through Flickr and to create online backups. The program can copy photos from iPhoto to Flickr simply by selecting which iPhoto albums you want to copy and letting it do the rest. It lets you uploads all of the photos in the selected albums to Flickr and arranges them in matching sets. It also copies each photo's important information from iPhoto, such as title, date, time, rating, keywords and description. You only need to manage your photos in iPhoto and whatever you do to an album in iPhoto such as adding, deleting, reordering, or editing pictures, PhotoCopy makes the same changes to your matching Flickr set automatically.
If you love iPhoto and Flickr then you'll really appreciate the ease of use and accessibility of PhotoCopy.