I do not have a Mac yet, but I am buying one soon and the following feature is very important to me: Because I have many photos, far more than I can store on my harddrive, I burn them off to DVD-Rs. Is iPhoto able to keep track of which photos I've burned to which discs? For example, I want iPhoto to keep thumbnails of every picture, and if I happen to click on one that is not on the HDD but burned to a disc, I want it to tell me, "This picture is on Photo Disc 2 you burned on July 4th 2007" or something like that. Does iPhoto do this? If not, does anyone know of alternative mac photo apps that do this? Thanks.