Update 3/16/2012: Used my Back-nBlack-GTK Overhauled theme as a base for this but changed all the grey to yellow.
Update 3/12/2012:Thanks to nowerries for telling me how to fix Ubuntu Software Center. I'm trying to figure out a way to apply this fix to my dark themes but until then use this fix.
Only bug I have noticed so far is fonts unreadable in Ubunut Software Center the fix for this is to in terminal type...
sudo gedit /usr/share/software-center/ui/gtk3/css/softwarecenter.css
.... and change the color value of @define-color super-light-aubergine to #000000
Updated 1/25/2012 V2: I fixed the problem when copying the theme to /usr/share/themes it all looks good now. I uploaded the changes
Updated 1/21/2010: I changed the progress bar to have more of a radius. Fixed the selected check boxes to have a yelow border (so you can see where to put the check in them).
Updated 1/19/2012: Okay added the fix for evolution and changed the screenshots so you can see some kde apps with this theme oh and also I changed the icons to Steel from [link]
per my friend rvc-2011 over at gnome-look [link]
and changed the buttons back to grey until you hover over the close.
This is my Back in Black GTK Theme with yellow added to match the wallpaper
All credit goes to original authors [link]
alecive . I love the window borders he created. and to m4xm4n for this theme [link]
I just blended these two themes together and did a hell of a lot of tweaking LOL!!