[orca-list] ImportError: No module named brl

[John Heim <jheim math wisc edu>]

I'm trying to install orca on a debian testing (aka lenny) system. I added a 
couple of lines to my sources.list file
I'm getting the following error when I start orca:

Traceback (most recent call last):
 File "<string>", line 1, in ?
 File "/var/lib/python-support/python2.4/orca/orca.py", line 55, in ?
   import braille
 File "/var/lib/python-support/python2.4/orca/braille.py", line 53, in ?
      import brl
ImportError: No module named brl


My system is running debian testing. I installed orca by adding a couple of 
lines to my sources.list to include experimental archives. Then I said:

apt-get install gnome-common
apt-get install gnome-orca

I also tried:

apt-get build-dep gnome-orca

But that generated an error message that said it was unable to find a source 
package for gnome-orca.  I have an AMD64 machine. Maybe the AMD64 archives 
are different from the i386 archives.