Elegant Brit with some fixes for Gnome 3.4. This is different to the Elegant Blackle theme as I edited the existing theme as opposed to starting from scratch. However, credit where it is due, I did use some css from Elegant Blackle to fix the Brit. A team effort I like to think of it. I've spent a bit of time tidying up the bouncing buttons as well.
Old Elegant Brit Gnome3 with a bunch of other really useful links
[link]Elegant Blackle
[link]Original Elegant Brit Theme
[link]edit: 09/08/12 Stole more css from Blackles infinitely superior scroll bars
edit: 11/08/12 Window resize grabbers are impossible to theme in gtk3. Well done for hardcoding that rubbish corner graphic chaps. So I did it badly.
edit: 1/9/12 Added the gimp ruler fix as suggested in the comments
edit: 13/9/12 Added sanitized .css files supplied by fopref and removed gtk-2.0-testing folder. There is still some minor button bouncing that I can't quite suss out. It's something to do with disabled buttons becoming enabled and then highlighted.
Free as in Beauty
I'm with you though, I really like the grip. I use an inverted one as my activities button in my Shell theme, with a matching ripple. It's here: [link] ... just a minor edit though, so not worth publishing.
1. The CSS files still give tons of warnings on application startup as sometimes units are missing. I corrected this, see these files:
[link]
[link]
2. I think you should exclude folder gtk2.0-tested from the distribution.
3. Left of every main menu entry there is an annoying white dot. Do you know about it or how to get rid of it? I use GTK+ 3.4.4
[link]