The design on Stack Overflow is pretty good: minimal, simple, doesn't get in the way. I believe they hired it out to a 3rd party. However, the color schemes on

The design on Stack Overflow is pretty good: minimal, simple, doesn't get in the way. I believe they hired it out to a 3rd party. However, the color schemes on all the other sites, just aren't quite as good, superuser being the worst. Amazing what difference just a little bit of color makes. The logo on Superuser looks a little amateur in my opinion too, especially considering the other ones that were submitted.