Apple chief Steve Jobs today took shots at Amazon while also explaining some of the decisions behind the new new iPods and his own health. The co-founder is famous for having attacked Amazon's Kindle in the past but has now said that the e-book reader's main flaw its specialized role: its cost is too high for a single function, Jobs said. He moreover suggested to the Times that Amazon's refusal to provide definite numbers for Kindle sales was a sign it hasn't succeeded in the market.