I have noticed that my iPhoto took up nearly half of my 640GB HD, I had 24K pictures. I did some house cleaning and removed lots of albums to folders on the HD and removed the pictures from iPhoto. After cutting out 18K pictures reducing the library to only 6K, iPhoto still took 220GB, my masters were only 56GB. I found there was a folder with over 158GB, full of tens of thousands of photos, even ones deleted years ago. I am now using Aperture 3, thanks for the good price. I now import folders and keep all my folders organized into separate folders by title. I hated the way iPhotos organized. it is good to recover so much of my HD back. I have now taken charge of my images and videos, importing separately, rather than using Aperture or iPhoto, then organizing them, then importing them into Aperture or iMove when I need too.