Have to agree, its great for playing games with the lighting effects, rumble and things for CoD4.
Don't forget it also works with media players for music and movies. I tend to stick with WMP and Winamp for playing music because the visualiser seems a little better and more dynamic when changing the colours of the lights. On the movies side, VLC works with it but you need to open a second window for the visualiser I think oh and Quicktime is meant to work.
For me though, the gaming side of awesome, and the added lighting effects when listening to music really add something extra and create a buzz at parties
I've just purchased a Philips amBX Premium Kit, which currently comes with speakers, a subwoofer, 2 fans, a wrist rumbler and a wall washer. The speakers and the wall washer contain lights that can produce around 2 million different colours changing to the beat of music or the environment you are in, in a game. They work together to produce a greater sense of touch and sight, for example if you're playing Call of Duty 4 and you're in a jungle, the lights will produce a green ambient and continually change to your environment. If you are in a chopper the fans will blow in your face and if you are in a gun fight the wrist rumbler will rumble to make it feel like you are really firing bullets, or getting hit! Combined they produce a new dimension to gaming.
I bought my Premium Kit over at www.play.com for a new reduced price of