Originally Posted by JSWolf
Wrong on both accounts.
As for ePub, there is a good amount of things you can do that you cannot do with Mobipocket. For a quick example, have a look at Zelda's ePub edition of Three Men in a Boat (posted on MR) to see some things ePub can do that Mobipocket cannot.
You seem to not fully understand the difference between hardware and software. Epub is software. Not hardware. Amazons version is also software. Amazons book software can be coded to do anything epub can do.. without a committee even. This is not a hardware thing unlike HD-DVD vs bluray which are two completely different hardware technologies.