Originally Posted by JSWolf
But how will this joystick support affect Mobipocket eBook on other devices?
Not at all if standard MobiPocket format is used. If for example "section" is used to get the functionality on the Kindle then Feedbook can easily add this. It will be much harder to add it to all MobiPocket books onn MobileRead which shows the disadvantage of doing manual work to produce a terminal format.