Bourbon vs. Whisk(e)y

So what’s the difference?   Do we also use whiskey barrels?  What’s the difference between whiskey and whisky?

Here are some answers.  These links are both to wikipedia so take some of the info with a grain of salt but they are generally on the money.  And yes, we have whisky (or whiskey) barrels at times and even some wine barrels!  

http://en.wikipedia.org/wiki/Bourbon_whiskey

http://en.wikipedia.org/wiki/Whisky