After upgrading to Amahi 6/F14, I tried to set up ServerScanner but ran into problems. I looked around and found phpSANE. It worked with a few tweaks. The default options are for an HP scanner but it was pretty easy to figure out what to change to make it work with my Brother machine. If anyone were to package this as an app, it might be possible to read the output of "scanimage --help" to set the correct options for a scanner attached to the hda. My notes are in the attached Word doc.
Edit: Added a couple of steps to the Word doc.