If you try to run hal-device-manager without having gnome-python2-gnomevfs RPM
installed, you get this:

[root@localhost ~]# hal-device-manager
Fatal Python error: could not import gnomevfs
Abort

Manually:
[root@localhost ~]# python
Python 2.4 (#1, Jan 12 2005, 11:15:47)
[GCC 3.4.3 20050104 (Red Hat 3.4.3-13)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gnomevfs
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named gnomevfs