I have just installed Beryl on my computer (with an ATI Radeon 9200). I have to say that it's very cool! Here are some screenshots showing the cool effects of rotating the desktop cube and scaling the application windows for selection:
My home desktop has an AMD Athlon XP 2500+ (512KB cache) with an ATI Radeon 9200 display card, and it's running Ubuntu 6.10 (Edgy Eft) at the moment. Some people (as I found out from some forums) and I who use (the comparatively old) ATI Radeon 9200 failed to install Beryl. I have made it to work eventually. Here it goes.
Use the "ati" Driver. There seems to be some problems using the ATI's closed-source "flgrx" driver with Beryl on ATI Radeon 9200. Some other people have encountered similar problems. So, I simply stick to the "ati" driver which should be automatically installed by Ubuntu by default unless you don't use an ATI card. Check /etc/X11/xorg.conf to confirm that you are using the correct driver.
Install and Setup Beryl with AIGLX. I followed some of the steps here [wiki.beryl-project.org]. However I use another way to start the Beryl manager automatically as I found it to work better.
beryl-manager manually to check if it works. It should replace your current windows manager. If you don't have the luck, you may encounter some problems here. Refer to the link above for troubleshooting.~/.config/xfce4/xinitrc:#!/bin/sh beryl-manager 2>&1 >\$HOME/.beryl-log & emerald 2>&1 >\$HOME/.emerald-log & exec sh /etc/xdg/xfce4/xinitrc
Simple and cool huh?
Note: The ATI Radeon 9200 is considered rather an old card. It does not support some effects used by some plugins, such as the blur effects, the water effect.