I specialize in pinterest clones. I can show you some example sites by pm. I will provide you with a cleanly coded script with a majority of the pinterest features like;
Send Invites
Create an account
Create pinboards
Gives a listing of based on category, type, image, video
Repin items after logging in
Like itmes after logging in
Comment on a pin
Manage your account
Edit your profile
Manage your board
Then I will give you a full administrative panel to manage the entire site.