Gregory:
Ugh. Without a clear grant we have no right to use the
images
The grant is clear. In fact, the grant is more clear than the grant to
license your Wikipedia contributions as GFDL. It's an agreement on the
upload form where the copyright holder has to make a conscious decision
to put no usage restrictions on their photo. Wikipedia, on the other
hand, merely states that by editing, you implicitly license your
contributions under GFDL -- a less clear grant, but I'm sure you will
agree that it is sufficient.
If Wikipedia put, in its terms of service, a clause that none of its
content may be used commercially without written permission from the
Wikimedia Foundation, that clause would be meaningless. The Wikimedia
Foundation is not the copyright holder; the individual contributors are,
and they indicate their choice of license by editing. It would be even
more silly for Wikimedia to do so if the pages themselves state that the
content is GFDL. This is effectively what Stock.Xchng is doing.
Erik