Text and talk with Alexa on the go

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On a relate note, last week at Recode's Code Conference, Jeff Bezos said that more than 1,000 people are working on Amazon Echo.
Awesome idea! Going to be forwarding this to all my Alexa owning friends.
Being able to text Alexa can be useful in crowded areas or when you are looking for privacy while interacting with Alexa.
I couldn't locate this in the US?