Today we get the latest full ongoing iterative back-filling explanation of Twitter and XMPP. Dave Winer’s intuition that FriendFeed is one of several (4) receipients of the XMPP data stream turns out to be correct. In a post this afternoon, Biz Stone confirms Summize and adds Twittervision and Zappos as the others. FriendFeed makes only small demands on its current subscriber base, but…
