Another competitor for Kindle

How many Kindles is too many Kindles? When Amazon (AMZN) first introduced its e-reader over a year ago, its sales made it a spectacular consumer electronics success. But, it may not have made the e-commerce company any money, despite helping Amazon sell millions of e-books.

No successful product ever lasts long in the market without sparking competition. And so, Barnes & Noble (BKS) came up with an e-reader to help balance trouble with its bricks-and-mortar sales. Sony (SNE), which has been bested in the consumer electronics field year after year, launched a reader. And the list of Kindle competitors is still growing.