[beagleboard] Is it compatible with SANE to run a scanner?

SANE isn't really processor specific. It utilizes abstraction libraries
like libusb or network connections. The problem is more likely an issue
with installing the SANE backends and supporting software for the OS
distribution you're using.

Ubuntu probably has a package for this, though I can't say what the
package name might be. I would imagine Angstrom does too. Fedora calls
the packages "sane-backends" for driver support and "sane-frontends" for
tools that manipulate scanners via SANE.

As far as I know, there is no GUI configuration tool for SANE. You have
to edit the configuration files by hand.

If you're OS distribution doesn't directly support SANE you'll have to
compile from source and install manually.