Was the Nuthin' But Worlds blog scrapped? Its seems to be something unrelated right now. The idea sounded great when I read about it on James Gurney's blog.
Yes. It was seriously lagging in posts (it was yet ANOTHER site for the artists to worry about and they're already busy enough that it was getting to be too much). Something may come up in the future, but at the present we're trying to expand the term "mech." The artists are encouraged to put their designs into context; kill two birds with one stone but showing the robots/ships in environments, etc.
Please keep comments constructive. The artists contributing to the blog are doing so for everyone's mutual benefit.