The U.S. Department of the Interior is considering changing rules regarding photography on land managed by the Bureau of Land Management, Fish and Wildlife Services, and the National Park Service.  That would include all national parks, and other places ( e.g. the National Mall in DC).

New Filming Rules Proposed on Federal Lands

http://dcist.com/2007/10/31/filming_rules_o.php#more

Tourists would still be allowed to take pictures, but the definition of commercial photography is vague in what they propose.  I think I would still take pictures and upload them to Commons.  But, technically I suppose we are commercial or freelance photographers, since we allow such use.  I would not like it if the new rules allow security personnel to be more bothersome when I'm taking photographs.

-Aude