The system already has the SEO stuff needed, is just that SEO relies a lot on text content and Chevereto doesn't because is an image sharing website. You can't expect to perform as a blog or something, it just doesn't have the content that SEO loves (unique own quality content).
The only way to get better SEO is by adding more context (text) and that's very hard because people use Chevereto to host images and not build "something" around that content. Who will write an unique description about each photo anyway?
There could be more content due to photo contests, tagging and stuff like that. Problem is that it will be always capped because our content is media, not text.