In spite of a major redesign effort, Amazon isn't likely to experience the iPod-like growth curve in Kindle 2 sales that some expect, a research note from JPMorgan says today. Analyst Imran Khan expects the retailer to sell only 500,000 of the e-book readers this year and thus that the company will grow relatively little from its sales of the first-generation Kindle in 2008. Amazon has been hesi