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Depends where you live due to the time difference, over here (UK) the event happens at 6pm, so the iPods probably won't be in stores until tommorow, but in the US, as the event is quite early, they'll probably close the stores for half hour to put them all out.
 
or they could be in store a month after the show them off 2morrow lie they were last year.
 
Just call the store and see if they know. Granted, they might not know, but better chance that they will know over people here.
 
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