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Beautiful desktop , very delicately programmed graphics , awesome looking icons ... effects that you will just keep trying out. These are few of the many things you will get if u install Beryl on your machine. Although there may be other versions(similar to it) but as far as i have explored beryl is easy to use and awesome !! If you are lost Beryl is the 3 dimensional desktop for your system ..
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and for Edgy : http://ubuntuguide.org/wiki/Ubuntu_Edgy)
try it and Enjoy! :)