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Got World Cup fever? Get a vuvuzela app for your mobile device!

If you've been watching the World Cup, you've probably noticed the vuvuzela by now. It's a type of horn that tons of fans in the World Cup stands are blowing, and it produces that incessant buzzing noise you hear during the matches. Whether you think it's annoying or a great way to show some spirit for your favorite football team [really? -Ed], the vuvuzela is probably not going anywhere, so you...