Ney Ricardo from our Surgeworks design team wrote a blog post few months ago that now became quite popular after it got featured on Smashing Magazine. To make designers and developers life easier, Ney created a Facebook GUI PSD resource that is given to you for free. The purpose of this GUI kit is to speed up Facebook interface design, sparing you from drawing all the comps and letting you customize all the texts, buttons and data as you need.
This Facebook GUI kit is fully layered. It was built with vectors and blending options, so that scaling and editing the objects will go smoothly for the designer. You can download it from Surgeworks website from this link: