Updates through Tweets: http://cow.org/c/
HAM radio like setup: http://www.railroadradio.net/content/view/24/143/
icaltrain link http://m.icaltrain.com/m_search.php?from=San+Francisco&to=Sunnyvale&day=Weekday
Caltrain Bike Car: http://twitter.com/bikecar
shoutcast http://railaudio1.railroadradio.net:7112/