The IOC is the owner of the global broadcast rights for the Olympic Games - including broadcasters on television, radio, mobile and internet platforms - and is responsible for allocating Olympic broadcast rights to media companies.
Olympic Broadcasting Services (OBS) is responsible for providing the international television and radio signals for the Games to all rights-holding broadcasters.
Live Streams from Rights Holders include:
BBC
http://www.bbc.co.uk/sport/olympics/2012/live-video
NBC
http://www.nbcolympics.com/liveextra/video-watch.html?video=prelims-rs-x-finn-star-laser-laser-radial-49er-elliot-6m
Netherlands
http://nos.nl/os2012/
Ireland
http://www.rte.ie/live/olympics/
Europe
http://www.eurovisionsports.tv/london2012/index.html
To find out who the rights-holding broadcaster is in your contry visit the IOC Website.
Video footage from the first qualification regatta, the Perth 2011 ISAF Worlds is avaiable at ISAF TV and on The Sports Hub.