I've got the previous generation PowerBook - 15" 1.5GHz with 1Gb RAM. I'm currently in university accommodation, and due to "technical difficulties" my room has no heating (i.e.: accommodation services take forever to replace a valve in the radiator). Being in The Midlands in England, and coming from South England, there is a bit of a temperature difference... Anyway, I've found my PB is quite a good heat source. Currently, I've been listening to iTunes with the medium-sized visualiser turned on for about 2 - 3 hours at a time. After about 15 - 20mins, an extra fan kicks in on the PB - I assume this is the graphics card fan, and it goes off about 5mins after I turn the visualiser off. Am I harming my PB in any way doing this, or shortening its life? There is a lot of heat coming off it - slightly more than in normal operation (when the really quiet fan is the only one on) Hopefully, it won't be like this for much longer Also, on an unrelated matter, what's the Terminal code in OSX10.4.2 that lists the top 10 (or however many) uptimes?