I would like to promote my photo manager Intipunku. Intipunku has been an attempt to provide a good feature rich photo manager for linux. At the moment Intipunku offers many things.
* Quick and easy photo filters and correction (incl redeye)
* Manual controls for contrast, brightness, temperature and colors
* Panorama creation
* Export to html album, flickr, picasaweb, flash video
* Import from camera, directory and picasaweb
* Translated in many languages
Currently i have released 0.4-pre2. It contains some bugs, however I would like to see how people think about it.
I fully support ubuntu (incl mint). There is an installer that configures you apt repo and adds intipunku repo, it will ask you for which optional components you would like to install and then finally installs. You can also easily install the apt repo and then install it with the package manager, when you want to access a feature in intipunku it will ask you whether you want to install the necessary package.
Check out all this at: http://intipunku.berlios.de
I couldnt attach no screenshots, but you can find them on the site.