Have a new Rev. B MBA that is really quite perfect. I was wondering about installing Coolbook on it as Safari goes a bit haywire quite frequently, banging on the processors when too many flash ads are on display, and I also frequently run WMWare with XP which also seems to hit the processors quite hard. Using normal OS X apps and not introducing a lot of flash, the laptop performs beautifully, but when there is too much sustained load on the CPU, the fans understandably rev up, and I find the noise pretty darned annoying. Would Coolbook solve my problems? Is there any reason not to install Coolbook? Can it be easily toggled between enabled and disabled states? Does it muck with the kernel recklessly or make it likely that an OS point upgrade might run foul?