I can’t believe that this was so easy to get working under Dapper.
Open up a terminal & type..
sudo mkdir /usr/share/sane/snapscan/
My copy of the Firmware can be found here! (not sure if this is legal or not?) Save it to your Desktop & In the terminal type..
sudo mv esfw41.bin /usr/share/sane/snapscan/
sudo gedit /etc/sane.d/snapscan.conf & change the line that reads..
firmware /usr/share/sane/snapscan/your-firmwarefile.bin & change /your-firmwarefile.bin to /esfw41.bin & save your changes before exiting.
That’s it! just plug in your scanner & start XSane or the Gimp.
I’ve not done a full test yet, but I’ve scanned in the XSane program & the Gimp without any hassle.