Beryl with Linux

Beryl is a desktop effects engine, kind of similar to Windows Vista's AERO. When people think of Beryl, (now called Compiz Fusion) if they are familiar with the newer versions of Linux, they think of the little cube you can turn for multiple desktops. I have heard that the engine, has to have a higher end graphics card to be able to run efficiently and be enjoyable. I have also heard that the feature doesn't have specific requirements. I'd like to find out, what does the cube take? I believe that Ubuntu 7.10 has the engine built in. Hmm, interesting. Here is a little video demonstrating some of the effects.