It was quite nerve wrecking because not everything went as planned, but I managed to fix it all and all previously uploaded files should still be available.
I have actually been procrastinating this for a while as I knew it was going to be hard and stressful, but I'm glad I got it over with :D.
All files that were uploaded to the testing site (:8080) have been deleted (not entirely on purpose, but it was for testing anyway so no big loss).
There is now a page where you can view all files you have uploaded: http://pixeldra.in/history
A fully documented API, feel free to build applications around PixelDrain, it would be an honor. Also tell me when you need a feature that hasn't been implemented yet. http://pixeldra.in/api
File lists can now be created from the Home page. All you need to do is upload some files and click the "Create List" button, enjoy!.
The UI on the viewer page can now be collapsed for a complete distraction free, full screen experience.
Lots of smaller improvements.
Improvements to list creation like sorting files.
Thumbnails generation, I've already thought this one out and it should not take too long. Thumbnails will be used to give a small (100*100px) of the files you have uploaded.
Improvements to the upload history browser: clearing history, sorting files, creating lists out of old files.
Feel free to tell me what you think!