I don't know anything about the ebook format support, but I do know that the T62W has an ebookstore on the device with subscription content. There are screen
I also don't know the OS, but get this. One of the external pictures shows an Android menu, and one of the dis-assembly photos shows Windows CE 6.0. Which one will they ship, I wonder?
Update: I found an ebookstore in Poland that might be the one shown on the device: