I'm interested in the the possibility of individual internet archives. Web browsers (or something like those) could automatically save all of a user's own stuff

I'm interested in the the possibility of individual internet archives. Web browsers (or something like those) could automatically save all of a user's own stuff (article comments, blog posts, tweets, emails) and everything they're interested in (bookmarks, rss feeds). Users could connect p2p and make bigger, more public archives.