One for the note-to-self file...
Strangely, it's labeled as a "Mustek 1200 UB Plus" on the unit itself, but lsusb says it's a "Ultima Electronics Corp. Artec Ultima 2000 (GT6801 based)/Lifetec LT9385/ScanMagic 1200 UB Plus Scanner"
apt-get install xsane sane-utils
http://www.meier-geinitz.de/sane/gt68xx-backend/ says I should be downloading sbfw.usb, which needs to go into /usr/share/sane/gt68xx
Uncomment override "mustek-scanexpress-1200-ub-plus" in /etc/sane.d/gt68xx.conf
adduser apollock scanner
scanimage -L should now report something like "device `gt68xx:libusb:001:002' is a Mustek ScanExpress 1200 UB Plus flatbed scanner"