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How-to install Beryl with AIGLX on Edgy Eft
[edit]
Add repositories

Edit the sources.list file, e.g. by opening a terminal and typing:

gksudo gedit /etc/apt/sources.list

Add this line:

deb http://ubuntu.beryl-project.org/ edgy main
deb-src http://ubuntu.beryl-project.org edgy main

For the GPG key (to ensure that the packages are authentic):

wget http://ubuntu.beryl-project.org/root@lupine.me.uk.gpg -O - | sudo apt-key add -