Matrox has released theirversion 1.00.01 drivers for XFree864.0.1. These drivers support the G200, G400, and G450 chipsets, and seem to addofficial 3D acceleration support through the DirectRendering Infrastructure, which the previous driver release lacked. TheREADME can be found here; and please remember that this is a beta release. Thanks to Jason Weaver for the heads up.
Matrox XFree86 4 Beta Drivers Version 1.00.01: