Advanced Human Light 1.0
Advanced Human Light is a GTK theme that uses the Murrine, Aurora, and, Clearlooks engines.
Supports rgba* in the main window while leaving buttons, tabs, and text areas opaque so as to enhance readability and usability without sacrificing eye candy.
*Assuming you have some sort of composting enabled and the proper patches to your programs and the murrine engine that supports rgba.
This was to be my candidate for Intrepid but I am not sure a theme using 3 engines is a good choice for a default theme.
GNOME is an international effort to build a complete desktop environment-the graphical user interface which sits on top of a computer operating system-entirely from free software. This goal includes creating software development frameworks, selecting application software for the desktop, and working on the programs which manage application launching, file handling, and window and task management.
GNOME is part of the GNU Project and can be used with various Unix-like operating systems, most notably Linux, and as part of Java Desktop System in Solaris.
The name originally stood for GNU Network Object Model Environment, though this acronym is deprecated. The GNOME project puts heavy emphasis on simplicity, usability, and making things "just work".