Quote - (WinMacLin @ Oct 2 2004, 05:19)
Nope powerbooks are completely different they was designed with close lid operation in mind, and there vents are discreetly placed to help with ventilation when in closed lid operation. The only thing with some powerbooks is if they do get hot for any reason screen up or down, the metal enclosure may warp out of shape

kinda bad though, as the PBs run hotter than ibooks anyway, and they warp. therefore id be just as hesitant to try this with either unless it was a cool environment - ie me warwalking in queestown with snow around the place