Ubuntu is an open source operating system and contains open source softwares maintained by Canonical. If you want to enable the Compiz for advance desktop effects then you also need to install third party graphics card drivers. nVIDIA GPU binary drivers are not maintained by Ubuntu team but provided by the nVIDIA and you can install it on your own. To enjoy the cool desktop effects like 3D desktop, rain drops, fire, etc - all you need to do is install the driver and Compiz.
Ok, let's see how we are going to do that in a few steps. And before you try to implement these steps, ensure that your system is connected to the internet.
Step #1 How to install nVIDIA driver on Ubuntu 10.10
>> From the toolbar go to System-> Administration-> Additional Drivers (click on it). The system will start searching for additional drivers and if you have advanced graphics card (like nVIDIA GeForce or other GPUs) embedded in your system, then a new window will show various nVIDIA driver options that are available for that GPU.
>> Now to be on the safer side select the [recommended version] and click on "Activate". Once you do that, the system will start downloading the driver from the internet automatically. After driver download completes in a few minutes, restart your system to complete the driver installation process.
Step #2 How to install Compiz on Ubuntu 10.10
>> From the toolbar go to Administration-> Synaptic Package Manager (click on it). The Synaptic Package Manager opens up, now search for "simple-ccsm", this package contains simple compizconfig setting manager application. Click on it and "Mark for installation".
>> Now click on "Apply" icon on the top. It will initiate Compiz package download. It will download the required and dependent python packages, followed by the Compizconfig installation. Now your Compiz is ready.
Step #3 How to enable Compiz desktop effects
>> From the toolbar go to Preferences-> Appearance (click on it), an Appearance setting window opens up. Under the "Visual Effects" tab, select Custom. That's it.
>> From the toolbar go to Preferences-> CompizConfig Settings Manger (Click on it), the Compiz setting manager opens up. There are many desktop effects, select, enable them accordingly and enjoy.
>> Desktop Screenshots and keyboard shortcuts
#Compiz in action: Screenshots
3D Desktop Effect
Window Wobble Effect
Rain Drops Effect
Flat Desktop Effect
#Here are some default keyboard shortcuts
SUPER+SHIFT+DRAG LEFT MOUSE = Draw fire
SUPER+SHIFT+C = Clear fire
CTRL+ALT+DRAG LEFT MOUSE = Rotate cube
CTRL+ALT+LEFT ARROW = Rotate cube
CTRL+ALT+DOWN ARROW = Fat desktop
SHIFT+ALT+UP = Initiate window picker
CTRL+ALT+DOWN = Unfold cube
ALT+TAB = Window switch
SUPER+TAB = Flip switcher or ring switcher, depending on which is enabled.
ALT+F7 = Initiate 'move windows'
SHIFT+F9 = Rain drops effect
SHIFT+F10 = Slow animations
CTRL+ALT+D = Show desktop
NOTE: SUPER key is a key with 'Windows logo' on the keyboards.
Disclaimer: nVIDIA driver support is not provided or maintained by Ubuntu, so that simply means that you are solely responsible if anything happens to your hardware and bOtskOOl will not be responsible for any error that occurs during driver installation process as described above.