MacUpdate is running a 1?2 off promo of LightZone today.
LightZone: built for photography
"LightZone fully embraces fearless visual experimentation. LightZone provides a unique visual approach to digital photo editing, allowing you to focus on what you want to do with your photos, not how you do it. All operations are live and have an immediate effect upon which you can make new editing decisions. No more guess work. The software allows you to enhance photos in a simple and natural way, without the steep learning-curve found in many other software programs."
Run, Don't Walk!