No specific info about version 6.0. Please visit the main page of Safari on Mac Informer.
Get an early glimpse at the upcoming Safari features.
Safari Prairiefire helps retire old/expired bookmarks from within Safari.
Export your Safari bookmarks to other browsers.
Easily access hidden preferences for Safari 4 Beta.
Safari extension that expands shortened t.co links on the Twitter site.
It is a simple application that extract your bookmarks form Safari.