There is a variety of commerical tools for archiving and management of digital photographs. Typically, these programs one large disadvantage - transition to another software is nearly impossible and hours spent tagging and organizing photograhs are lost. There are sophisticated solutions, such as Extensis Portfolio, but not everybody can devote time to learn this great, but somewhat complex program with steep learning curve.
Long Tail Group therefore identified the typical needs for digital photo management and developed a simple tool to stay organized.