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For the first time, Walmart is offering its Facebook fans an early, exclusive preview of its Black Friday deals, including toys, electronics and apparel. Those who like the store on Facebook are supposed to get the news later today.

Shopping at Walmart is your guilty pleasure, but would you share with your Facebook friends which store in the chain is your very favorite? The world's biggest retailer hopes you will, and it's launching more than 3,500 store-specific Facebook pages to connect shoppers with what's happening in their local aisles.

What do you like? That's the question Facebook and other websites ask, or will soon, every time you visit. In a quest to make it easier to share the things you like with your social network and to know everything you like on the web the Facebook Like button is now showing up on popular websites...