I hadn't thought about that issue, but you raise a good point. I have been considering purchasing one, simply to quiet typing when in a classroom. According to the website, it should be okay. http://www.iskin.com/faq_protouchPB.html Also - an update to the key issues - I asked the Mac Genius at our local (new!) Apple store, and they said that they would replace the keys with no problems. I did seem to get the indication that they would replace the individual key covers - not the entire keyboard. That may vary from location to location though.... > Hello, > > These covers are really neat ... but for a laptop i'm a little > concerned that the cooling is disturbed. By putting a skin on top of > the keyboard you block the extra cooling of the ibook via the > keyboard. > > Johan > > PS I'm going to order one of these iSkin's for my external keyboards :)