Elementary GTK theme version 2.1 was released today, bringing support for GTK3. Other changes include: dropped Aurora engine, the panel is now dark by default and bug fixes as well as a new Xfwm4 theme.
Here is another screenshot via DeviantArt (credits: DanRabbit):
To install the latest Elementary GTK theme 2.1 in Ubuntu 10.10, use the following commands:
sudo add-apt-repository ppa:elementaryart/elementarydesktop sudo apt-get update sudo apt-get install elementary-theme
For other Ubuntu versions you can download the .deb.
You can also download the latest Elementary Icon theme (2.5) via Deviantart - it was released in October but unfortunately it's not available in the PPA.
How to revert to the old grey panel instead of the new dark panel
To use the old panel style, press ALT + F2 and enter:
gksu gedit /usr/share/themes/elementary/gtk-2.0/gtkrc
Then at the bottom of the file, replace:
Download Elementary Theme 2.1 for other Linux distributions.
Thanks to Pixibuntu for the news!