I can't find the xfwm theme, but it had a good balance between usability and "fun". That with some GTK theme such as the default for XFCE 4.6 looked fun to use without looking very childish.

Altough I must 'konfess' that the Keramik theme with the Noia icons and some handwritting font made reading advanced man pages in Konqueror a lot less "dramatic" and careless, thus, keeping the stress down.