One of the Michael Nilsen's projects is the so-called Academic reader. After a first look I was curious about its difference from standard RSS-readers, like Google Reader for instance. A bit later I found a little post about it:
"In the existing site, the main difference between the Academic Reader and RSS readers like the Google Reader is that we have a variety of ways of searching and browsing older papers. This means the Academic Reader allows you to both (1) keep abreast of your current reading, and (2) look back into the past, discovering older papers and so on. RSS readers typically focus on just the first of these problems."
Since a new tool contains all metadata from journal archives, it looks like a hybrid of an RSS-reader with some offline library like (my favorite) Papers.