For those interested, freetype aware programs under x-windows can use Apple's version of the font server for font anti-aliasing. To enable this, just add the following lines to /etc/X11/XftConfig:
dir "/Library/Fonts"
dir "/System/Library/Fonts"
Then restart X11 and try:
open-x11 xterm -fa Monaco -fs 12
X11 should come up with an xterm with smooth text! In principle any freetype support program should work with this. Credit should go to
The Fink Users Mail-list and Ettore Aldrovandi for this cool little trick.