A while ago I read an article called Join the Dark Side of Visual Studio about the colours used in the Visual Studio IDE, however I found the colour-scheme of Infinities Loop a bit too dark.
But last week I stumbled upon this article about using the Textmate Vibrant Ink colours in the Visual Studio IDE. I admit, it takes a couple of days to get used to, but after having used these colours for about a week now, I really like it and find it to be easier on the eyes. Scott Hanselman also has an article about black vs. white and Jeff Atwood have written an article about Code Colorizing and Readability
So give the "dark side" a try and download the Visual Studio Vibrant Ink Scheme created by Maruis Marais: Vibrant-Ink.rar (2.15 kb)