The tagging aspect of the project is interesting. Being able to find something specific easily on the web can be at times difficult due to a general lack of descriptions for images.

I have a habit of describing by filename every single image/gif/video I download which helps beyond measure when performing a search, and have over 8,000 files named in this way. I can find what I'm looking for in a few seconds. The benefit is it only takes a few moments to name initially but saves an enormous amount of time in the long run. Rewarding users to tag descriptively is a nice idea.