http://www.themarthablog.com/

http://www.arenamagazine.co.uk/

http://dougal.gunters.org/blog/2007/07/16/14-awesome-wordpress-powered-sites

http://rubiqube.com/35-professional-looking-corporate-websites/

http://rubiqube.com/10-great-website-designs-using-wordpress-as-cms/

http://wpcube.com/

http://wpcandy.com/

http://looppress.com/

http://wpgarden.com/

http://publisherblog.automattic.com/

http://www.ndesign-studio.com/blog/wordpress/best-wordpress-sites

http://rubiqube.com/10-more-great-website-designs-using-wordpress-as-cms/

http://www.mostinspired.com/blog/

http://wpcandy.com/sites

http://www.wpproject.com/is-that-really-wordpress/

http://wpcube.com/

http://wordpress.com/notable-users/

WordPress is also run by Le Monde

• Alex King’s Crowd Favorite not only has great design, but is a perfect example of using WordPress to power a business site.
• And Crowd Favorite, in turn, is responsible for All Things Digital, which is powered by WordPress-MU. Alex also has a great series of articles about building a customized WP site.
• ChickSpeak is another WordPress-MU site, with a focus on women’s issues. It’s structured more like a social network than a blog. There’s an article outlining ChickSpeak’s development that’s interesting, as well. via: photomatt
• If you grew up in the eighties like my wife and I, then you can remember when musician Thomas Dolby was blinding everybody with science.
• CNN’s Political Ticker blog is a WordPress.com VIP Hosting site.
• Robert Scoble’s Scobleizer blog is another WordPress.com VIP site. Scoble has been an icon in weblog circles for many years now, and is famous for his prolific output, as well as for being an author and a former Microsoft technical evangelist .
• Yodel Anecdotal is Yahoo’s corporate blog.
• delicious:days is a food blog that looks good enough to eat. Simply beautiful.
• NASA Ames Research Center is powered by WordPress. This group is responsible for many of NASA’s cutting-edge research projects.
• PlayStation.Blog is the official PlayStation blog from Sony U.S.
• Nancy Pelosi, the first female Speaker of the House, has a blog called The Gavel. WordPress is in ur guvrnment blogging ur lejislashun!
• Ford Motor Company’s Global Auto Shows site doesn’t look much like a blog, but it’s all wrapped up in WordPressian goodness.
• CSS Remix is a showcase of sites with
  great design. And the site itself looks schweet.
• welovewp.com highlights many WP-powered sites. Some are business-oriented, some are more standard blogs, but all of them have really great design. Oh, and of course, welovewp.com is powered by WordPress, as well.

http://rubiqube.com/35-professional-looking-corporate-websites/ —very nice