I think that's a fascinating idea - logistical problems (not speaking the language etc) aside. I'm NOT a Keith Olbermann fan. I think in America we have an incredibly luxurious journalistic class. They can whine and berate the powers that be all day every day without risking anything. Put someone like KO in an oppressive country with real stakes and it just might make him more responsible, thoughtful, thorough.
as I understand it, jtv has a more active and dedicated community and more user generated content than the other sites. ustream and livestream seem to have more corporate partnerships, more big events streamed live, but jtv has a more loyal fanbase and following of users.