Adobe Photoshop Lightroom
Have been playing with Lightroom over the past couple days and have been quite impressed. You can download a 30 day trial to check it out: HERE.
There are some really good videos posted on Simplephoto.tv on how to use some features and functionality by Matt Antonio:
Viewing Options in Adobe Lightroom
Lightroom 1.0 Library
Lightroom 1.0 Develop
Matt has a few more and I am sure will be making even more soon, so search Lightroom on sp.tv to see more!