Groupon breaks the whole Teh Interwebz.

The web coupon site Groupon has always offered coupons for local businesses. If enough people signed up for spa treatments in, say, Chicago, then the whole group gets a discount. Now they've gone national with an offer at The Gap that was so popular the site crashed.

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John Moe is the host of Marketplace Tech Report, where he provides an insightful overview of the latest tech news.

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