Yes, wonder what all is under that black cover.....?
Nothing special other than the CPU, RAM, FLASH, and maybe some custom ASICs. It is just used to direct the air from the fan - that way they can be sure the system will have the correct amount of cooling.
The Mercury Cell Accelerator Board features a 2.8GHz Cell processor, 1GB of Rambus XDR DRAM, 4GB of DDR2 SDRAM, Gigabit Ethernet, and a PCI Express x16 interface. Rated power draw is a whopping 210W, and the card is 12.283" long—about an inch shorter than NVIDIA's GeForce 7950 GX2 graphics card. Expect the Cell Accelerator Board to become available in early 2007 at a price of $7,999.