Heya,
In tomorrow's Rawhide (or maybe the day after) will be support for the
Freedesktop sound theme spec.
This means that libcanberra will be pulled in as a dependency.
So please, test the control-center's new sound theming support (see the
"Sounds" tab).
And file bugs against any application that might be using libgnome or
their own thing to play sounds (apps that come to mind are
gnome-phone-manager, Gossip and gnome-power-manager).
Cheers