Positive Reviews For Nvidia' GeForce 6800 Ultra
It's all relative.
Considering how many more transistors and raw power are in NV40 compared to the CPU seated next to it, it's a wonder that it doesn't require much larger/more exotic cooling methods. On top of that, there are single-slot solutions on the way.
Why stop at complaining that a Shuttle couldn't support a $500 video card? Let's bitch about its lack of PCI-X slots for GbE, or SCSI RAID. In a small form factor system, you have to expect some tradeoffs.