It wasn't the spelling mistake, it was the complete lack of content. I would expect more of a writeup of why they they are giving it to him, etc, etc. The spelling mistake really caught my eye though - it just seemed unprofessional. It's just not what you expect when you hear "Nobel prize".
The peace prize is awarded by the Norwegian Nobel Committee, and not the 'normal' Nobel Institute. The official site for the peace prize is at nobelpeaceprize.org and the official announcement is at http://nobelpeaceprize.org/en_GB/announce-2010/
That was pretty well hidden. You have to click on the small grey-on-grey text that says "Nobel Peace Prize 2010" then the even tinier grey-on-grey text that says "Press Release" just to see who the hell this guy is.
Go straight to the page and you see his name, his photo, and a bunch of text in Chinese (which I now see are comments).
It's there, the UI just obscures it. It's actually an accordion and when you click "The Nobel Peace Prize 2010" tab you can see more like the "Press Release".
Regarding the typo: it happens all the time to all kinds of sites.
It's clearly legitimate; highest rank on google for "nobel", listed on wikipedia as the official site, etc etc etc