I'm sorry, but that Metacity theme and even the GTK+ theme are really lacking. They lack the polish that Meerkat's Ambiance theme has (everytime I post a screenshot of stock 10.10 I get comments asking what the themes are).

It's a shame, I think Gnome-Shell looks cool and I think GNOME3 brings a lot of UI/UX changes that have been needed for a while, but they're not doing themselves any favors giving the actual appearance a real chance to shine. The "GNOME" default icons are a pity, too.

edit, I guess it's not Metacity any longer... Mutter.