Teigur,
If you are asking if you can have two scanners attached to your system at
the same time, that is definitely possible.
If you are asking if you can have two scanners actively scanning at the same
time, I believe the answer is no, at least through Windows Fax and Scan
(WFS). I'm not sure if this is also a limitation of the underlying WIA
framework, but WFS doesn't appear to allow you to do more than one at a
time.
Is there a particular scanerio you're trying to enable?
Dan