AA works with libxft2, the new version. As well you need some true type fonts, and gtk2.0 installed ( libgtk2.0 ). Gnome2 will be AA by default, as well as any apps using gtk2 ( gkrellm2, gedit, etc ...).
I use OpenBox WM wich support Xft2 rendering...but all don't. As well, in mozilla/phoenix, to enable AA, you need to edit : /usr/lib/mozilla/defaults/pref/unix.js
and give it : Use Freetype2; false) <== replace with true, and specify the TT preferred directories. As well make sure to include your True type font dirs in your /etc/X11/XF86Config-4, as FontPath "/ya/tt/fonts/dirs" , then restart X or, xset fp rehash as root
Once again depends of you WM, KDE and Gnome are AA all the way now.
Hope that helps......
btw: On debian, we have a great app called 'defoma', if ya intrust font management to it, as debian installer will ask you, ya use then dfontmgr as root to make fonts avalaible to apps
Windows is not an OS, it is an utility to reboot your computer .