Replaced deprecated function (now useing get_users)
Fixed all notices when wp-debug is on.
Fixed error when wordpress is installed outside of wp directory // thanks Crhis Nolan
Tested WP3.1, no big changes.
Display name support
Custom slug support (when using a plugin to rewrite author slug)
Custom author link after slug (choose between username | nickname | display name)
New feature to exclude authors with 0 posts (Thanks paul for request)
New feature requested by vectorism (thank you): Exclude administrator users from the list.
Exclude function get information from wp_capabilities or blog_capabilities. If it's not working on your blog, please contact me.