Still working on the site and haven't official release it, but here's a peek at it at
Artevolve - Home for your Creative Work
I got the idea ccMixter and github, except the same derivative/remixing idea applied to artwork/photography. The site has all the usual features like uploading and hosting the artwork/photos (unlimited storage, plus you can attach RAW, psd, zips, etc per each submission), commenting, voting, forums, portfolios, profiles, etc.. and yet to add an api/rss, facebook intergration, push/pull to other sites, and hope to add features once I have a user base to their needs.
The unique feature of the project is remixing/deriving aspect: where users can remix and derive each other's submissions, and the site would keep track of the derivatives and view the evolution of a artwork over time. For example, I upload a photo, then you can download it, modify and improve it, and upload it back again... and the site would keep track. Example.
Artevolve - Loner Moped by Janitha K Of course, only uploads with a derivable license will be allowed to remix (such as a creative commons license), else it would be all right reserved of the artist and the site won't let you derive.
So Thoughts/Comments/Critiques?
Usual TPF users or professional photographers aren't exactly the target audience for this project, more targetted at hobby and art/photography enthusiasts who do it for fun... but I frequent TPF so wanted to get some feedback from you good folks anyway

The entire system from backend, frontend, storage, design is all home made and hand rolled. Hopefully I'll have time to work on it a bit more and release in a week or two.