Ereader Comparisons

I looked to Cnet for a comparison of the ereaders that are out there and am disappointed that the techie's have not researched this technology. I do know that Sony has a couple of ereaders, the Amazon Kindle has a couple of versions and Barnes and Noble has just recently come out with it's own ereader program but requires reading an ebook on a computer rather than a seperate device. I am hoping that someone would do a comparison of the ereaders taking a look at the pro's and con's of each versus the value.