Hi Vim,
I know you're not looking for a washing machine and vacuum cleaner, but
perhaps you should look at the Brother and HP MFC models. The HP 7650
has an auto-document feeder (ADF) which was a must have for me. Because
of the ADF it can scan both sides with the built in duplexer. (It can
also print duplex.)
The nice part about the scanner is it can be configured (via web
interface) to scan to an SMB file share. I'm running Samba on OpenBSD
4.1 and have it scan straight to the share and then pick-up my scans
from the folder. The only trouble I've had is occasionally the scanner
will complain about not being able to find the share. It will usually
find it once I push "OK" and restart the scan.
I haven't tried SANE with it nor have I tried printing from OpenBSD. We
print typically from OS X. However, HP have been really working with
the community to release all the code necessary to print with CUPS (and
perhaps with lpn). It should just work(tm).
I used to have a Brother 38xx that could scan straight to a card. That
was my solution back then.
Good luck finding what you want.
--Aaron