6. Universal Orientation (Landscape home screen):
The existing landscape hacks don't apply on the home screen, BUT in one of my restarts, I noticed for a very short time, the home screen was displayed in landscape mode; so I guess it's possible.
Update: I made a simple extension that does EXACTLY this. All credits go to
eureka. Just extract the attached file in your extension folder.
Known issues:
Screensavers are by default 600x800. I have a KT3G-SO, so when it goes to sleep I see the ad improperly but it doesn't bother me at all. Well I don't want to disable ads or alter my Kindle to show customized 800x600 ads because I like Amazon and it is not fair. All in all I'm happy with it.