I know a brilliant designer with great design skills and a portfolio you can look over.
I didn't post a link originally because I wanted to ask his permission to do so and ask whether he was available. If you want to see some of his portfolio on-line you can see it at http://www.designbyspirit.com.
I'd rather recommend someone I know and admire personally rather than a random website or people I don't know really anything about in terms of honesty and integrity. I don't get any financial benefit from recommending him, I just admire his skills and his work ethic.
If you like his designs you could easily find someone in the Drupal.org community to do a theme conversion from an original design. Drupal is not only a cool system but a great community and there are a lot of good people at Drupal.org who would be willing to help you out in the forums or be available for hire. See http://drupal.org/node/995766