I just finished my review of Adobe Lightroom. Basically, it is the answer for people who:
Don’t use a Flash on a mountain shot
You know how to shoot, you have a digital SLR, and you take good pictures
Are tired of iPhoto’s poor layout and weak architecture
You liked it in the beginning, but after your library grew, iPhoto couldn’t keep up
Are looking for “a better way” to manage and present their photos
File management, slideshows, export to web, print — Lightroom has it all.