sorry about the delay in responding to you.
I found a couple of interesting posts on forums and sites online that may help
the PhotoSync app mentioned here looks interesting:
(it's mentioned in the other link too)
Hopefully those utilities will help you with your photo management.
Customer Service Rep,
Thanks for your suggestions.
I'm a bit farther along in my quest. I learned, for example, that Dropbox! is not the way to do this, because the iPhoto database .pkg file is full of links that are just pointers on the local drive, but get resolved by expanding them to multiple copies of the image files within the database by Dropbox!, making the iPhoto Library 3-10 times the size it would be were these links not resolved.
I've merged the iPhoto libraries on my desktop and portable Mac and transferred the merged library to a portable FW800 bus-powered drive, but in the process discovered that 5 events I had created 3 years ago in the Library that was on my Mac Pro didn't contain the image files themselves (the original files remained in the ~/Pictures/ folder, with each event's images contained in a folder in the ~/Pictures folder (each event carrying the same name as the Folder containing its images on the Mac Pro. The Library functioned normally on the Mac Pro, but with the portable drive mounted on the laptop I was reminded of the dozens of image files not actually resident within the library. One way to fix this might be to delete all these events from the Library, then recreate them by dragging the Event folders in the ~/Pictures folder back in to the iPhoto library. Is that the best way?