what is it called when there is no coments but a link to read more of the story?

Is there a plugin fo this? or is it a feature there by default?

se examle on first post here?
http://www.mezzoblue.com/

Thanks

That's use of the extended entry, and is the standard behavior, except that he's customized the 'more' link.

It is also seperate to the comments being on or off. =)