Wal-Mart's Sam's Club warehouse stores will offer free Wi-Fi at all 500 locations by November: I'm not sure why it's necessary to add Wi-Fi in these stores, because they don't encourage shoppers to linger or waste time. However, the press release suggests coupled with a Sam's Club app that's due out for several mobile platforms that you'll be able to pull up much more product information in the store (as well as price shop).
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