http://mercextra.com/listen/podpress_trac/feed/20/0/isv61607.mp3 Interview with Technorati’s Dave Sifry http://feedproxy.google.com/~r/mercpod-tech/~3/Jk7urkH6yLE/ 2007-06-15 http://www.mercextra.com/blogs/podcasts/general.jpg