The new Nikon D3S has a native ISO up to 32,000 and extended ISO up beyond 100,000. Yikes.
As somebody said on a PC site, if the real usable ISO is only 3200, it's still far beyond what any other camera gives you.
The camera also has a much bigger buffer than older models, two card bays .... and the possibility of HD movies.
Here's the link so you can click on it.