Quick post to say what a great use of social media i think this is:
The royal wedding is in 11 days! What would you wear to the ceremony? Pick something out on http://www.neimanmarcus.com/fb and post the link here on our wall. Jolly good!
Props to whoever at Neiman Marcus thought that one up. Not only will they be able to harness the viral nature of facebook, they are sending facebook fans directly to their site where its likely they'll be drawn to make a purchase.