Isn't it supposed to have no fan ?
No it's definitely supposed to have a fan. It comes on in MacOS. The problem is that the PMU is not fully supported yet, so it doesn't understand that the processor is too hot. I'm trying to find information about it, but I'm not having much luck. If anything, try running Paul's pmud (you can get it from rpmfind.net). It helps a little.
Tim
