Here is an Application called Home Screen Settings and can be used to hack your home screen of your Nokia N9.
Current Features are:
- Unlock/Lock devices orientation
- Remove the weather widget from events view
- Show only white text (changing the events and switcher screen to have brighter and more visible text)
- Change the background of the homescreens to a single image/wallpaper
- Change background to “Sine Waves” – Dynamic wallpaper like PS3/PSP
This update brings with it;
- A new dynamic wallpaper known as horizon. Update: The Horizon dynamic wallpaper will dynamically change its color
scheme based on the time of the day
- A “glitter” effect on Sine Waves, which looks even more like the PS3 wallpaper, and
- Also the ability to have three Images, one for each of the Screens (Events, Launcher, Switcher)
This update should be in the store soon.
Source My Nokia Blog