Much Kudos to xzzy, who points out that Bungie is offering cleaned up versions of the Tank and Corridor screenshots at . However, some people (myself included) are still waiting for the DNS propagation, and can't access the site. For those lucky souls, xzzy has copied the screenshots to his own server, and they can be viewed here in the meantime:
What a difference not having to scan and Photoshop those screenshots makes!