Debian Moves To X.org
Due to the lengthy Sarge development process, Sarge shipped with XFree86 rather than X.org. Since most Linux distributions switched to X.org quite some time ago, this put Debian more than a little bit behind the curve.
The Etch release, however, will sport X.org. Debian Administration provides a tutorial on moving to X.org. Debian is also transitioning to GCC 4.0 as the default gcc/g++ for Etch, which is covered here on the Debian mailing lists.