After years of mulling an initial public offering, Prada's board of directors has approved of the company's intentions to be listed on the Hong Kong Bourse. Prada's currently making about 2 billion Euros a year in sales, and investors are betting that the company is worth at least 6 billion Euros. The stock market debut could happen as early as July. So why is Prada going public, and why is the company going public in Hong Kong instead of Europe, where it's based?