Flock has completely changed how I interact with the so-called Social Web.  In my case, that means Facebook and Flickr.  Ever since I first started using Flock and received the help I needed to get the blogging to work, I’ve been using it every day.  In fact, that only thing that has kept me from having it be my only/default browser is that it’s extremely slow in Flickr when loading pages.  Also, in any pages with videos (whether from Youtube or Vimeo) there is a video and audio stutter that renders the video unwatchable.  But that’s the only real negative I’ve been able to find with Flock.