Now it has launched Salesforce.com Communities in a limited beta pilot that is expected to be generally released next year.

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The Seattle, Washington-based company is asking developers to submit an e-mail address to be notified when a "limited beta" of the Kindle Development Kit starts next month.

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The new version of the site, now in limited beta, with official launch in sync with the concert, will include a Pandora-like offering that will allow people to create customer radio stations.

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