Since I switched to the dark side I’ve made several tweeks and customizations to the Son of Obsidian scheme. I’m a heavy ReSharper user (i.e. addict) and ReSharper on its own extends and overrides some of the the highlighting and what not in Visual Studio, hence the original scheme looks a bit broken when turning on all the ReSharper features.
I’ve finally decided that is was time to publish my changes so if you’re into Son of Obsidian and ReSharper, this is for you:

Download Son of Obsidian scheme for Visual Studio 2012
Download Son of Obsidian scheme for Visual Studio 2010
Enable enhanced syntax highlighting
To enable the enhanced syntax highlighting and color identifiers in ReSharper, go to the Options dialog and check both Color identifiers and Highlight color usages.

See how to change Visual Studio color scheme