I just found one of the best Wordpress plug-ins in my opinion. It is called WP Tiger Administration, which uses CSS2 to change the appearance of the WP admin backend. The plug-in truely beautifies the backend. I am writing this post with the plug-in enabled and I am really enjoying this. I never wanted to post from the backend before but seems like this plug-in will make it enjoyable. There are screenshots on the plug-in webpage.
WP Tiger Administration currently only works on Firefox and Safari since it uses CSS2. If you are using WP, it is a must have.