"I got more and more pissed off," says Milne, 30, shelling out 4% of sales in interchange fees for his first business, a maker of speakers. He turned a vexation into a new business that would make sending money a cheap and easy proposition. Dwolla, an online and mobile payment system, lets users pay for bar tabs or dog walkers (or speakers) via e-mail, text message or social networks like Twitter. Consumers love the service. Merchants pay just 25 cents in fees for amounts over $10, instead of up to 1.9% of a transaction, plus a quarter, as Visa charges.
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