Tracking all the newspapers, magazines and journals that digitise their archives and make their history available, is hard work. Here are two more I had overlooked: German weekly newspaper Die Zeit has put the complete archive online, like the Hamburg colleagues in Der Spiegel are about to. And Nature has completed its archive digitisation all the way back to 1849 (via mymarkup). Access to the Nature archive requires subscription, but there is also a free site documenting the history of the journal.