Facebook Advertising

I know class is over, but I thought that I would share my Zappos/Facebook experience. I just ordered a pair of shoes on Zappos.com, and on the order confirmation page, this popped up:

What would you like to notify your friends on Facebook about?

• Share the specific products I purchased
• Share only which brands I purchased
• Share that I bought "something cool" on Zappos.com
• No Thanks

I guess this is how they are trying to get people to opt in!