I'm sure most of you have seen Kodawarisan's disassembly of the iMac G5. I have a couple quesitons regarding them: 1. What's that grey plastic thingy to the left of the ports? Bluetooth module? The Airport antenna is supposed to be somewhere else. 2. The larger fan at the top of the motherboard, is that for the GPU? I noticed that it's a quite a bit further up from the GPU? 3. Finally, who/what is "Broadcom"? On Kodawarisan's site seems to suggest that it's the GPU, but shouldn't it be Nvidia?