Some sites that I like the look of are,
Accepted File Formats:
PNG and PSD(unflattened)
My website is about the popular Legend of Zelda video games. he site will be ran with Joomla so you do not need to code the design, just provide me with the PSD. Comments will be posted on every design.
If you don't know about the Legend of Zelda you can read about it here.
You can find offical art work here and here.
Screenshots can found here aswell.