I have a RC410 IGP, and, despite not working properly, I can tell gallium has progressed. Back when xorg-edgers put gallium in a separate package, I tried it and compiz and glxgears gave me corruption. Earlier today I tried them and glxgears didn't render properly (gears were all white and the background was chromatic blue/pink/green/etc), and compiz would just show me the gnome-panel theme (but no icons or text on it), a blue wallpaper and gnome terminal's silhouette. Well... not useable at all but an improvement as it actually rendered something.
I get the white gears and chromatic background with the gears as well. Kwin 3D effects work rather well and with no issue, but other than that no other 3D app. is usable (they either don't run or are massively distorted). RS480 with latest xorg-edgers gallium packages.
With the latest gallium xorg-edgers updates I'm now able to run glxgears with none of that color anomaly. The Age of Decadence combat demo (through WINE) works again with the update. Will try some of my other games latter today.