While I have never executed, I have spent a great deal of time trying to come up with a more book-like interface to a web journal.
It just occurred to me that it would be funny (amusing to me, at least) to change the style sheet on the archives such that older pages would discolor, like the way acids in some papers cause the paper to yellow and disintegrate.
I would not want the pages to become illegible, but it occurs to me it might be a sort of visual queue that would indicate the relative age of a post.
Yeah, that or the actual date associated with the post? ;)