If you are looking for some simple, clean wordpress themes, no matter for personal blog or for corporate websites, I think there new wordpress themes suit you best!
Simple Clean WordPress Theme 2010
All 3 clean wordpress themes are coming from Theme Trust, which is a new wordpress theme website that provide quality professional, functional premium wordpress themes for customers.
BusinessCMS WordPress theme: Leverage
This is a business CMS wordpress theme with fully widgetized homepage, options to define your own color scheme, a built-in icon set, custom menus and page templates, custom options panel and more. The color and simple clean homepage looks great! More business wordpress themes.
WordPress CMS Theme: Quantum
A vibrant business theme with built-in icon set, there are 16 color and texture combinations, multiple page templates, custom options panel and more. A very cool corporate wordpress theme. More than 80 cms wordpress themes.