I can highly recommend Web Couturier

The Simplon theme and logo were custom developed by Web Couturier. The design and development process was a very pleasant experience: we went through about four quick iterations for both the logo and site design to find something that both works well and that I like. After that the Plone skin was made and it works beautifully: all the intricacies of the Plone user interface work fine and all used third party products work correctly. As always happens with these things I did find a few minor things I wanted changed; Web Couturier was able to quickly make those changes for me. I can highly recommend Web Couturier.