Ken,
You can find the original hockey stick graph here, along with a very cogent discussion of it's controversial origin, as well as diminishing scientific importance and brief media stardom.
The hockey stick has data is now pretty irrelevant. There are numerous completely independent proxies that show the same thing. So, even if one concedes to the skeptics on the hockey stick. The game is not over - there's a lot lot more debunking to do.