I recommend these wordpress themes. They use the Genesis Framework so if you want to start using any of them you need the Framework to add them on:

Here’s the Genesis Framework:

Check out the Genesis Framework

Here are some of the themes suitable for blogging for small business:

Focus Theme - A Clean and Powerful Theme for WordPress


Pretty Darn Cute - Modern WordPress Themes for the Feminine Blogger

Modern Blogger

Tapestry Theme for WordPress