This is one site that will appeal not only to geeks, but to anyone who enjoys getting a good deal. Even if you just enjoy cats and witty commentary, as long as you have clear wireless internet or some other means of getting online, you’ll also find something to love here.Groupon is a deal-of-the-day site that offers a stunning coupon every day for a product or service in your geographical location. Each deal has a minimum amount of coupons that must be purchased in your area before the deal will stick. If that minimum is reached, everyone is good to go. If not, the deal is forfeited and no one has to pay. I don’t have the statistics on how often a deal falls through, but I will venture a guess that it’s very rare that one you really want will pass you by.Groupon was founded by Andrew Mason in 2008, with 1 million in seed money from his former boss Eric Lefkofsky. The company has an estimated 2010 revenue of 350 million and is valued at 1.35 billion, reaching more than 150 cities or markets around North America and an additional 100 in Europe, Asia, and South America. Despite the difficulty of coordinating daily deals in all of these markets, hundreds of copycat sites have sprung up around the world. For our money, though, Groupon is still the best.Why? The Groupon Promise, for one. Symbolized by the pinky swear (the epitome of a strong relationship), the promise ensures that any dissatisfaction with your purchase will lead to a refund. I’m sure there are exceptions, but this is still a wonderful way to back up your purchase. Another bonus is the humorous asides from the Groupon cat, featured on a luxurious cloud at the bottom of the daily deal. He’ll be your guide in the most confounding aspects of modern life, including text messaging abbreviations.The success of Groupon hasn’t gone unnoticed. At the end of November 2010, industry giant Google had all but clinched its acquisition of the company, reportedly for 5.3 billion. Presumably, Google has a plan for making the expensive day-to-day running of Groupon (coordinating deals, putting everything online, coming up with the funny cat quotes) a more streamlined business. Despite being the most Google has ever offered in an acquisition, the deal is still a coup for the company. In 2010, Yahoo! reportedly offered 3 billion dollars for the company, but was rebuffed. Apparently Google is simply a more seductive suitoror perhaps more persistent (the company’s original offer was “only” 2.5 billion).So, to summarize: deals? Check. Quality assurance? Check. Funny cats? Check. Really, geeks, how can you go wrong?UPDATE: Despite previous appearances, Groupon rejected Google’s offer. It is now expected that Groupon may go public by 2013.