You can easy do that with line and full view. Some info about this here: http://ez.no/community/forum/install_configuration/folders_and_custom_views/re_folders_and_custom_views__1
I did a different approach when I built this site: http://event.modul.no/sasbraathens/index.php/event/cruiseonly
The situation here was to keep the underlaying news when switching to viewing the full article. I added a /(filter)/full to the Les mer-link, and a check.
The customer also wanted to be able to display a different content when viewing the full view, so I also added an xml-field (full_description) to the class. The class looks like this: title, intro, description and full_description.