Ok today is the day I'm going to attempt to add XGL and Compiz to my Ubuntu Dapper install. I've read a few walkthroughs and I think I have the basics down. I'll let you all know how it goes.
For those who dont know, XGL and Compiz are software packages that add OpenGL 3d-acceleration to the Linux desktop, giving it OS X and Windows Vista- like effects. You can see an example below: