I use the Brother 7820N as an slpr printer. I updated the driver
with the ppd files from the windows driver. In order to use the
scanner I have to use VPC, there is a driver to work on linux with
SANE but Brother releases binary only. I wrote to them asking for the
code but got no response.
Here is a link to how to update the pscript driver as was asked earlier
in the thread: http://svn.netlabs.org/ecups/wiki/WikiStart