Interesting. It might be a good idea to deal with the collection of posts like imgur deals with a collection of images. Maybe give them their own url, like imgurs albums, and call them stories instead. 'Lists' sounds too formal and boring, a story implies a strong cohesion and that they have something to tell.
I saw 6 houses today, had a lunch appointment with a large customer and "date-night," cut me some slack.
Well, you said in a comment to mknod that So you'd archive the archives? Sounds a bit redundant. Besides, archiving is putting it away, while the list shouldn't be solely for saving stuff. What about 'collections'? Then, you can have collections of stories, of saved posts, of articles. And it's a verb!You might want to be able to archive the lists you've built.