Today, the new Amazon Kindle 3 released.Many people compare iPad,Tablet and Kindle.The new Amazon Kindle 3 have free unlimited wireless 3G service and built in Wi-Fi.The new Amazon Kindle 3 unlike the data plans for the iPad 3G, which run $15 or $25 per month, with a ceiling on how much you can download. The new Amazon Kindle 3 has price at $189.compare iPad have price starts at $499.The iPad and tablet is full computer user.But new Amazon Kindle 3 only book ereading.From CNN reports that  Forrester estimates that the new Amazon Kindle 3 comprised two-thirds of the 3.7 million eReaders in the U.S. market at the start of this year. That’s not likely to change soon: Of the nearly 20% of US adults surveyed online who are considering buying an eReader, 69% are leaning towards the new Amazon Kindle 3, though the report notes that figure will surely be eroded by tablets like the smash-hit iPad.While the iPad and its ilk may pose a threat to eReaders, there’s still plenty of market to share. Forrester predicts 29.4 million US consumers will own eReaders by 2015 Sales of Kindle books, meanwhile, have surpassed those of hardcover books: Amazon announced last week that it sells 180 Kindle books for every 100 hardcovers.The new Amazon Kindle 3 users buy more than three times as many digital books as the number of physical books they bought before owning the device. And Amazon’s 630,000 books available at the Kindle store certainly tips the scales for serious readers contemplating the iPad’s 60,000 titles.