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I read on one of the live feeds that Google was the default, but you could just from two others.
 
Ryan Block apparently didn't listen very well. Bing is a new choice and was probably put on the demo units to show off something new. Steve-o said Bing was new but Google was default.
 
Or someone else was fiddling with the settings. Steve said in the keynote that Google is the default.
 
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