Space colonization/settlement links

Apologies for cross-posting...

As some of you may know, I'm the editor for the "Space Colonization"
section of the "Open Directory Project":

http://www.dmoz.org/Science/Technology/Space/Colonization/

Links listed in the ODP/DMOZ are specially highlighted by many search
engines and other websites, including Google.

If you have any recommendations for links or corrections on those listed
already, please email me - apsmith@... or submit through the
"suggest URL" link on the above page. If you'd like to help, fill out
the "become an editor" form. It may take a few weeks for new links to
appear in the live directory.

Thanks!

Arthur Smith