I would just love a third radio button in the privacy settings that turns on a default page stating "This site is Under Construction, check back soon or Bookmark this page" .
This would allow webmasters to create and design their site absolutely "offline" with no one able to go sneaking around but administrators - or maybe a multiple choice option. (Who can see the site: Admin only, Editor, Author etc)
You could ad some additional links to wordpress - eg. do automatically a search on the topic of the url on wordpress.com or add links to wordpress.org. This would create a ton of links!