Today a new version of X.org, 7.0 was released. A major change in this release of X.org is a new modular layout and integration of autotools for building. The 6.9 release is the same source code but using the old imake based build system.
One consequence of the modular system is that Linux distributions are now, for the first time, will now integrate X.org into the "normal" location on the filesystem such as /usr/lib and /usr/bin instead of /usr/X11R6. The Fedora development tree
From those documents the following new features I found noteworth:
* EXA support included. EXA is a new accleration architecture to replace XAA to give fancy desktop graphics without the need for a full blown 3D driver.
* Radeon driver updates. Full 3D support for r3xx/r4xx series without having to use the binary only ATI driver.
* Multiseat support. One computer, 3 video cards (or a single multi-monitor video card, 3 keyboards, 3 mice. Check out a picture of the result here.
Cool stuff! For future changes coming to X.org, check this out.