PBS has been down with Amazon's Prime Instant Video service since it launched, and now it's providing even more all-you-can-eat video for streaming under an expanded agreement. Naturally that means lots of episodes of NOVA and Antiques Roadshow, and "for the first time on digital video", 200 episodes of The French Chef with Julia Child. According to Amazon, that puts its total number of selections over 12,000, more than double the amount of content it launched with. It still
