This has become the main skinning website. Good job. I hope it gets linked officially by the osu! staff in the client or on the website, to get even more people involved.
I will contribute even more skin elements, because you deserve it.
Fun fact: Me and a guy were trying a project like this with beatmapr.com but it was discontinued. I'm glad to see someone took it upon themself to make something so great and polished.
One last thing I would like to see: A page on our profile where we can see elements uploaded and maybe edit them (the creator for instance) for proper crediting