First install Sun Java(TM) JRE 1.6.0 (Mustang) in Ubuntu
The rest is easy, set up the repository for lookingglass:
## LG3D repsoitories
deb http://javadesktop.org/lg3d/debian stable contrib
# deb http://javadesktop.org/lg3d/debian testing contrib
# deb http://javadesktop.org/lg3d/debian unstable contrib
sudo apt-get update
Now to install the needed software from the repository:
sudo apt-get install lg3d-core
This will install lg3d, jdk and java3d.
You will need to accept the 3 licenses for lg3d, jdk and java3d to complete the installation, so if you prefer to use synaptic, keep the details button open!
Thats it!
Now log out and let gdm (not sure if kdm works) choose for the Lookinglass session, and you will see a beautiful 3D desktop!!
The installation was easy with a little help from this page.
Please read this to check if your video-card meets the needed requirements!!
Tuxicity's source 
This doesnt work it reports that it is the wrong version for my cpu.
Download Complete!
Checking java binary file…
/usr/bin/make-jpkg-mustang: line 76: strings: command not found
The java binary file is not for your i386 architecture, please download the right file
lee@lee-desktop:~$
this is my out put last lines form terminal.
Comment by lee wossum — January 7, 2007 @ 4:43 am
ace@ace-desktop:/usr/lib$ sudo apt-get install lg3d-core
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Couldn’t find package lg3d-core
ace@ace-desktop:/usr/lib$
Seems the package is not there…
Comment by Svend Hansen — January 26, 2007 @ 11:38 am
donno what you guys are doing wrong but it worked for me.
Comment by spoon — March 25, 2007 @ 5:01 am
u have to install java jre and java plugins
Comment by Leandro — May 4, 2007 @ 4:48 pm