I have to develop a scanning application for the Canon 9000F, but I'm having troubles with WIA and TWAIN. I've read on the SANE project's home page that this specific scanner works pretty well with their technology, so I would be interested if it is possible to use the SANE backend on Windows platforms.
I found some information on this website: http://www.zago.net/sane/windows/sane_on_windows.html
SANE on Windows: The port has been integrated in the CVS tree on september 23rd, 2003. It will be available in SANE release 1.0.13.
Windows is also listed as platform on the SANE's wikipedia page:
Operating system: Microsoft Windows, Linux, UNIX, OS/2