This bugs me as well. I just searched the site and there is NO word that is has no fan...so I think it has one! After all, you have to cool a G4 800 AND a GeForce 2 MX! In the old model, the CRT monitor created enough heat to "soak" the air away from the CPU, creating a constant air movement which kinda "cooled" the processor or at least prevented the air around it from heating up more and more. The same principle was used in the Cube with the low end Graphics boards. But I doubt that the new iMac has no fan. Cooling a G4 800, SDRAM, the graphics board and a superdrive just by some air circulation? That would be a true miracle!