Amazon just had a big sale on 2nd-gen Kindle E-readers, so I picked one up. I am completely happy with the reader and I love the screen, but I am not so happy with the relatively small number of file formats the Kindle supports. I have picked up quite a few ebooks over the years, mostly in Epub and .lit formats, but with sprinklings of a number of other formats, as well, none of which are natively recognized by the Kindle.Luckily, there's a wonderful piece of software available, known as Calibre, which is capable of converting the vast majority of the myriad ebook formats into the digitally signed...