This might be more of a digital video topic, but I felt it was interesting enough news to post here on the digital photography forum, since it's a dSLR used to do this.
http://philipbloom.co.uk/2010/04/10/house-season-finale-shot-entirely-with-canon-5dmkii/
http://philipbloom.co.uk/2010/04/10/house-season-finale-shot-entirely-with-canon-5dmkii/