Smashing Magazine‘s recent post released a free Facebook GUI PSD Kit. It was designed by SurgeWorks and released for Smashing Magazine and its readers. The main idea behind the kit is to speed up the prototyping of Facebook application UIs and Facebook fan pages, thus sparing you from drawing all the comps and letting you customize all the texts, buttons and data as you need. As usual, the kit is free to use in all projects, without any restrictions.