It would be nice to have a script that would start with this as a base, but let you tune the contrast. I like the theme, but would like more contrast than this (I use small fonts, and I really feel like more contrast is necessary when doing so).
fwiw, there is a high contrast option in the vim colorscheme (let g:solarized_contrast="high").
I'm working on cleaning up some of the build scripts that generated specific files (the mutt directory has an ugly shell script as an example, there are better ways of course).