Craigwd: you don't ask, you just wait for it, or go get it by upgrading to the version that carries it. Assume i'm in Woody and i want to install the wm XFCE4, i would have to dist-upgrade to Sid because at the moment, it's the only version that has it; OR go to
www.apt-get.org and get a backport to Woody.
Diferent versions have diferent lists of packages, Debian has 3 versions woody, sarge, and sid.
Go to
www.debian.org and do some serious reading, check the sections on 'packages', documentation/apt howto, etc
salud,
macondo