In case you are not aware, you do not have to actually import your files into iPhoto... you can point iPhoto to wherever you decide to store your images. I keep my files on an external hard drive... iPhoto then just creates its file/folder system for the thumbnails only... prior to this ability, I refused to use the app for catalogue purposes.
While I use iPhoto, mostly for the book/calendar stuff, I actually use Extensis Portfolio to catalogue my images. If you're a working photographer, you may want to create your own ways of sorting your work... such as who bought what, how much, paid or not... not the kind of stuff for the general shooter. FYI, Portfolio catalogues any file, not just images. That said, you gotta like the direction that Aperture and Lightroom are going in.
I work in the news business. Most Mac users have Photo Mechanic as their browser... many Windows users have AC/DC. Reuters uses proprietary software. In all three cases, I'm referring to a browser software that doesn't have a cataloguing capability. Regarding Photo Mechanic, the features that attract us, is the macros, code replacements and ftp capabilities built in, to mention three. (Both Aperture and Lightroom have macros capabilities.) I think for the non-news photographers, either Aperture or Lightroom would be excellent choice.
I find it interesting that Grimace prefers the cleaner looking Aperture... it's the info-in-my-face look of Lightroom that I like. Apple's tutorials for Aperture are excellent. That's why you download the demos and play.
Again, regarding someone's Olympus RAW file format... don't save any of your RAW files in their original fromat. Resave them as Adobe DNG. I can't even remember the original model of digital Canon camera we started with but we can not open those RAW files in the latest version of Photoshop. Save your files as DNGs... Adobe promises to support that format... do you have an app that doesn't yet support your new digital camera format?... convert it to DNG and then open it.
Very interesting! I was not aware that I did not have to import my photos into iPhoto in order to use it. It bothers me that my photos are all in some mysterious library file somewhere. Can I take out the ones I already imported? I'd like to put them in a regular directory structure on another drive.