XFree vs. xorg

[Nathan Kroll <krolln@gmail.com>]

I have recently become aware of the fact that Debian is still using
XFree86 4.3 on all of its releases and seems to have no plans on
converting to xorg.  Is this true? Is there development underway for
make xorg the new default x server?

I'm just wondering because it seems odd to me that debian isn't
jumping on it since everything else (in unstable at least) seems to be
very up-to-date.

Just looking for any info on possible debian adaption or if anyone
know what is so much better about xorg over 4.3 (besides the license
stuff).

Thanks.

Nate