CentOS 5.9 Gnome x86 is here.

You can download the images here

CentOS 5.9 base x86 is here.

You can download the images here

CentOS 6.3 is here (Gnome x86)

You can download the images here

CentOS 5.8 is here (Gnome x86)

You can download the images here

CentOS 6.2 is here (Gnome x86)

You can download the images here