Hi, There is now a SANE backend for GT-6801 and GT-6816 based scanners. It's based Sergey Vlasov's gt68xx driver. Actually, he did all the hard work and I only added the SANE interface.
It's the first release and so it's VERY alpha: http://www.meier-geinitz.de/sane/gt68xx-backend/ It intends to support the following scanners: Mustek BearPaw 1200 CU Mustek BearPaw 2400 CU Mustek ScanExpress 1200 UB Plus Mustek BearPaw 1200 TA Mustek BearPaw 2400 TA Mustek BearPaw 2400 TA Plus Only the first one is tested and somewhat works. Maybe other scanners that use one of the GT chips can be supported, too. Please test and send bug and success reports. Happy scanning, Henning