GTK 2.10 - Progress

Ars Technica has an interesting article up on the latest and greatest version of GTK.
Here's the interesting bit:

A new function has been added that will enable GTK applications to detect the presence of a compositing manager like XGL, possibly a prelude to more extensive integration of translucency in various GNOME applications, like real transparency in the GNOME terminal.

Perhaps we'll see something beyond better translucency effects in applications though. Compiz provides some very slick desktop effects, and it'd be neat if applications could trigger some special effects and interact with the window manager in a cool way.
Progress.