I battled with this the first time I tried to install the Brother HL-2070N back when I had SuSE 10.3, and I struggled with it again with SuSE 11.0. Mind you I got it working both times, but next time should be a breeze:
– First, make sure the CUPS server is running.
– Read this link to the openprinting database.
– Then download and install both the lpr driver and CUPS wrapper from the brother website.
– The printes should be added to the CUPS server, however it is set up as a USB device. Click the Modify Printer button and select Internet Printing Protocol (http) on the second page, then on the next page, for the Device URI use http://192.168.0.80:631/ipp/port1
– That’s it. Print a test page, and it should be good. Oh, don’t forget to set the resolution to 1200.

On another note, the 2070H driver doesn’t not offer much in the way of options for the print.
Since the printer is capable of emulating HP LaserJet PCL 6, I added another Brother 2070N printer, but HP LaserJet 6 drivers.
Works great, and I have more control over the final image/print.