Build some social media sites

We are looking for someone to design and implement social media sites for us creating and branding them together including myspace, facebook, twitter, youtube, ext... All the sites need to be branded together and linked together. These will be for a penny auction site that is being also created and will be based off of it. You need to be very familiar with how these sites operate and function gaining us the most visibility. Let us see some other work you have done that is similar or the same.