I recently started using a black theme for Visual Studio and love it. I would also like it if I could get all the panels to change colour to something more like the Expression suite of programs. Im guessing this is not possible in VS2008, but can it be done in VS2010 since it uses WPF?
I work at a company that build online training products. We have some good research data that says dark colors in higher frequencies cause less eye strain. While this does't really answer your question, dark blue with white and yellow text colors seems to be best for extended viewing.
Just found out in VS 2010 you can go:-
Tools ... Extension Manager ...
And look for a extension called Visual Studio Theme Editor (It seems one of the highest ranked).
This tool seems to allow you to modify the theme in VS 2010. Don't think you can make it look like blend as such, but you can change the colours at least.
Feels kinda weird coming back to (I think) my first question and answering it after all this time. Hope this helps the 2 people that favourited it :)
Also found this: http://www.nerdpad.com/visual-studio/visual-studio-2010-dark-expression-blend-color-theme