WP-addiction is an Fresh, Stylish and Clean , with a lot of simplicity and perfection.
It has been professionally designed to be easily addapted and modified to suit almost any kind of blog.

features :

• thumbnail with automatic resizing
• custom stylesheet from admin panel
• elegant dropdown menu
• login from top
• Related Posts
• Author box
• Gravatar ready
• stylish threaded comments .
• Feedburner/rss Integration
• twitter Integration
• Share panel (Digg, Twitter, etc.)
• Valid CSS and XHTML
• compatibile with all Major Browsers
• detailed help files.
• And Much More…

no plugins needed
compatible with wp 2.7.x , wp 2.8.x