Here is a nice relaxing blue 3D theme, or at least kind of 3D'ish.
Optimized for 1280x1024 screen, but also works fine on screens up to 1600px.
"Please DO NOT publish adult content on ThemeBeta.com" - it looks like a couple of my designs were too riské for the admins here.
No worries, you can find more of my Chrome themes here:
see "free stuff".