Watching for network mounts (NFS, SMB, etc)

[Madison Kelly]

Hi all,

   Is there a (relatively) consistent bus to listen to for anything 
being mounted or unmounted on a system or, failing that, listens for 
network devices like NFS or SMB being [un]mounted?

   I can't rely on a graphical application like Gnome's VFS daemon as I 
can't expect any graphical interface to be installed on a user's 
machine. I am hoping there is something on the system bus. :)

   Thanks all!

Madison