Fountain Music is a nice visualizer. It's very responsive to the music. It works fine in full screen mode on my 22" Apple Cinema Display (resolution at 1344 x 860) with a dual 1GHz G4. I have, however, upgraded the video card to an ATI Radeon with 256 MB of RAM. On a 15" PowerBook G4 there may simply not be enough video memory to support it in full screen - some screen savers are more efficient than others that way.

On the downside, the pattern selection is rather limited. Considering what real fountains can do - at some of the hotels in Las Vegas, for instance - I would hope to see more in Fountain Music - and wouldn't mind paying a bit for it if and when it is enhanced.