Quarlewm at jmu dot edu offers to temporarily loan such a scanner to anyone who is interested in writing a driver.
Backend: ibm (1.0-4 (unmaintained) Link(s /sane/ibm-backend/ Manual page: sane-ibm Comment: This backend has had only limited testing.
Pixma TS8180 Series USB WiFi 0x04a9/0x183f Untested Testers needed!DocuImage 620S scsi Unsupported Not supported.Pixma MP760 USB 0x04a9/0x1708 Minimal No grayscale.Dmitri Katchalov did some investigations on this scanner.Is reported to work.Dpi, A4 Backend: bh (1.0-4 (unmaintained) Link(s ml Manual page: sane-bh Comment: Supports Copiscan II scanners with Remote scsi Controller (RSC) interface Manufacturer Model Interface memory optimizer expert v.2.2 crack zip USB id Status Comment Bell and Howell copiscan II 6338 scsi Good Duplex Scanner with ACE - development model copiscan.Imageclass MPC190 USB 0x04a9/0x2635 Untested Testers needed!Such features would be better implemented in a separate stand-alone tool.ImageRunner iR1018 USB 0x04a9/0x269d Unsupported Probably not supported.ScanMaker 9800XL ieee-1394 Minimal ieee-1394 seems to work.
KV-S6055W scsi Unsupported might be supported by matsushita backend.
G2-600 USB 0x0461/0x0380 Unsupported Probably unsupported.

Pixma MP810 USB 0x04a9/0x171a Complete All resolutions supported up to 4800DPI.P-215 USB 0x1083/0x1647 Basic This is the same device as the 0x1646 P-215, but the mode switch on the scanner is in the wrong a wise man's fear pdf position, you must move the switch.Pixma MP360 USB 0x04a9/0x263c Complete All resolutions supported (up to 1200DPI).Colorado USB 9600 USB 0x0461/0x0340 Unsupported Not supported.WorkCentre Pro 412 USB Parport 0x043d/0x4303 Unsupported Not supported.USB vendor and product ids to be checked.Flatbed, ADF simplex and Duplex supported.KV-S3105C USB scsi Unsupported might be supported by matsushita backend.Not known if it is similar to other Relisys/Teco USB scanners.ScanSnap S1300 USB 0x04c5/0x11ed Good Same as S300, with different usb id ScanSnap S1100 USB 0x04c5/0x1200 Good Letter-size ADF.Xerox Travel Scanner 100 cara manual update eset smart security 5 USB 0x04a7/0x04ac Good All resolution and mode supported, calibration is available 2400 Onetouch USB 0x0461/0x038b Complete GL646 based, resolution from 75 to 2400 dpi Panasonic KV-SS080 USB 0x04da/0x100f Complete All resolution and mode supported, calibration is available.