Jeff Bezos unveiling the Kindle Fire last year.

Amazon has sold out of its Kindle Fire one week before a news conference where the company is expected to unveil a follow-up to the tablet and other Kindle devices.

The company has “an exciting roadmap ahead,” teases Amazon CEO Jeff Bezos in a news release this morning touting the growth of Kindle Fire over the past year. The tablet has been the most successful product launch ever from the company, and is the top-selling item on Amazon overall.

Amazon says Kindle Fire has captured 22 percent of tablet sales in the U.S., the only country where it has been available. On a worldwide basis, the Kindle Fire had 5 percent market share in the second quarter.

The company has been rumored to be working on a large-screen Kindle Fire to compete more directly with Apple’s iPad.

Amazon sold the first Kindle Fire for $199, believed to be at or near a loss, hoping to make up the difference with additional sales of digital media and other products. The company notes that the top 10 products on Amazon since the Kindle Fire’s launch are all digital.

Also of note: Amazon launched its Appstore for Android in Germany, France, Italy and Spain this morning — a possible prelude to an international expansion for the Kindle Fire.

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