Ubuntu Compiz Profile download :
"3DCube-Ubuntu11.04-Experimental.zip"
http://theregrunner.de

Warning : Highly experimental ! Do this on your own risk.
Tested on Ubuntu 11.04 Natty Narwhal Alpha Version 3 , 64bit, on March, 13. 2011

On Failures :
reboot,
click on your username, choose Classic Desktop
or classic Desktop (safe mode) from the menu
now you should be able to reset the settings with ccsm on an other desktop.

https://bugs.launchpad.net/unity/+bug/711561