Just what the doctor ordered
Folks who have lots of images, like web designers, photographers, or porn collectors, often need to archive them in an easily searchable way. Making the archive web-accessable is a major plus, as web pages can just query the database as a read-only user (or you can replicate a copy of your production database for web purposes and stick it in your DMZ).
It's an idea that I've often thought about, and am glad to see that someone has taken the time to develop.
An open, cross-platform journaling program.
A scientific plotting package.