I'm a big fan of dark colour schemes when spending long hours staring at the computer screen when developing software. The Vibrant Ink theme for TextMate (for Mac) was fantastic for Ruby, so naturally I love the update to Rob Connery's WekeRoad Ink theme.
This is a refresh of Rob Conery's take on the Vibrant Ink theme for TextMate. The original settings are available for download from Rob's post on WekeRoad, but this one has a few additional settings to take advantage the expanded syntax settings in VS2010.
There are more Visual Studio colour schemes available at studiostyles.
You can directly download the theme for Visual Studio 2010.