I recently wrote that I don’t like Top Commenters plugins, in fact I used a very strong word… loathe. There are some benefits to introducing Top Commenters to give some level of special recognition, but whatever SEO benefits you think it might offer are discounted by having it placed in your sidebar across the whole of your site including your duplicate content pages.
Chris Pearson has just written a dynamite post on how to use custom CSS with a WordPress theme.
It is especially important if you tweak your themes a lot, and the theme designer is highly active in upgrading themes with new features, and also helps if you tend to switch themes for various custom elements. A lot of plugins for instance ask you to add some CSS to your main CSS file, because they don’t inject it into your header automatically.
Just a short plea to all WordPress Theme authors.
Please make it easy to find who created a theme.
All you have to do is include the correct information at the top of your CSS.