CleanIce 2.3.0 which now requires GTK+ 2.4 or newer and adds support for the GtkComboBox and GtkComboBoxEntry widgets as well as fixes a few bugs, is now available.
CleanIce 1.2.6 is now out with major fixes to the metacity theme. It now works much better with both light and dark themes. The tarball has been renamed to "cleanice-theme", as it is no longer just a gtk+ engine.
CleanIce 1.2.4 is now available and sports a theme for Metacity as well as a Metatheme for GNOME 2.2 using the gnome Icon Theme. It includes many bugfixes and drawing improvements. Enjoy.