AIKOUSHA  Actually, they are no longer working on it. It was bought by Apple and now is the Primary visualizer for iTunes. So, if your iTunes is fully updated, just turn on the default visualizer.  
(Version 0.2b)

EEFF  it is down for now as the developer is working on it.  
(Version 0.2b)

HENDO  This is an amazing screen saver, but I wish it didn't jump around quite as often, there is not enough time to see each new cool visual  
(Version 0.2b)

RDGILES21  Visually Stunning! Simply a beautiful addition to itunes. Amazing effects. Definately a 10 five star  
(Version 0.2b)

DATRUHD  I really love this. I have lots of idea now since I do a lot of video work. Can't wait for the full screen support ;)  
(Version 0.1beta)

CREMATEDFISH  brilliant! thank you developer! responds great to shpongle....

request: the ability to turn off the text that shows what track just started playing  
(Version 0.1beta)

ASH435   This is easily my favourite visualiser. The effects are stunning. I beamed this onto the ceiling at a party.

Although there are only a few main themes, their ability to vary with the music are impressive.

As with all visualisers, I wish there was a way to run them outside iTunes so that they can be easily assigned to a second monitor (full screen) and react to audio from the built-in microphone. Any developers know if this would be possible?  
(Version 0.1beta)

TONYBOY  Simply beautiful.

I look forward to seeing this one evolve. My only small criticism is that for a visual display that visually morphs, fades and glides, there are, from time-to-time, what look like abrupt cuts between particle configurations. These cuts seem a little out-of-place and are a bit visually confusing.

This is a very minor grips for such a breakthrough visualizer. I still can't figure out how it seems to match the mood of each song: funky songs look funky, gentle songs look peaceful, etc...

Amazing!  
(Version 0.1beta)

MKLLOW  This is an amazing visualizer.

Not only is it really impressively beautiful; it also reacts in a new fashion to music: via rotation of view / change place of particles in a sudden way. This makes it really look responsive to music.

Well done!! I love it.  
(Version 0.1beta)

XENEX  Very nice!

Only thing that's missing is full-screen, but hey -- it's a 0.1 beta after all.  
(Version 0.1beta)

ORION MK. V  Very cool. I'd love to have some "options" settings.   
(Version 0.1beta)

STUDIO ATHENS  wooooooooooooooohhhhh...........

better suited to dance music than pink floyd

very nice!  
(Version 0.1beta)