I was chatting with Crystal Williams yesterday, the amazing organizer that put together the recent DrupalCampLA, and she mentioned the company she works for just launched the new Trixbox commercial site with Drupal. It's a very clean design and implementation of Drupal.
Also, Merlin Mann, just released the new 43folders site on Drupal. Another great looking theme. He leveraged the RoopleTheme to turn his design into what it is. You can check out all the different RoopleThemes here. The 43folders web site is a great productivity web site with a big focus on the Getting Things Done principles.
If you haven't noticed, I am currently using one of the RoopleThemes on this site called LiteJazz, although this may change in the future.