Last week we reported that Google was to add an "Unavailable After" META Tag. Since then, we've spoke to Dan Crow of Google, who provided more information on how to use it, as well information on a new way to send robots blocking info within HTTP headers.
The "unavailable_after" Meta tag will allow you to tell Google that a page should expire from the search results at a specific time. For example, if you have a page that you would like to be removed from the search results at 6pm EST on July 23, 2007, you would add the following Meta tag:
<META NAME="GOOGLEBOT" CONTENT="unavailable_aft [...]
Related Topics: Channel: SEO | Google: SEO | SEO: Blocking Spiders