Guest Post By Rob Diana of Regular Geek (Twitter/FriendFeed)Well, the microblogging API space sure got interesting in a hurry.First, on Thursday, Louis Gray reported that Twitter was throttling unauthenticated API requests. This obviously would effect several applications in a very bad way. Later in the day, Dave Winer let everyone know that Identi.ca has implemented the Twitter API. And on Friday, in a surprising move, TechCrunch announced that Twitter is sending the XMPP firehose to ...