DeviceKit is a set of projects to replace HAL. The repositories are available here
http://gitweb.freedesktop.org/?p=DeviceKit/DeviceKit.git;a=summary http://gitweb.freedesktop.org/?p=DeviceKit/DeviceKit-power.git;a=summary http://gitweb.freedesktop.org/?p=DeviceKit/DeviceKit-disks.git;a=summary
For gnome-disk-utility, a GNOME project for providing 1) a library to interact with DeviceKit-disks; and b) Palimpsest, a Disk Utility application, see
http://gitweb.freedesktop.org/?p=users/david/gnome-disk-utility.git;a=summary