Twitter and Amazon Go Hashtag Shopping and Solve a Problem No One Ever Had - Businessweek

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"Amazon.com’s priority is to remove every barrier that might keep someone from buying something online. A particularly minuscule obstacle fell on Monday as Twitter made it possible for users to add items to their Amazon shopping carts with a tweet.

Just enable the service on your Twitter (TWTR) and Amazon (AMZN) accounts, and you can add a product discussed on Twitter by replying to the tweet and adding the hashtag #amazoncart. The next time you visit Amazon, the item will be in your cart, and you can then complete the purchase."

Twitter and Amazon Go Hashtag Shopping and Solve a Problem No One Ever Had - Businessweek