Karl Edwards is an Irish man in Australia selling electronic-cigarettes to Americans. While he accepts traditional money, he likes dealing in a virtual currency that seamlessly travels across borders.
His positive experience with bitcoins has even inspired him to launch BuyByBitcoin, an Amazon-like, purchase-anything kind of website.
Most of his business is still in government-sponsored dollars, though. He's not investing heavily in Bitcoin, as he still sees the currency as an experiment.