Grand Theft Auto IV sold six million copies in its first week alone, netting $500 million for its publisher, Take-Two Interactive. That’s even better than the wildest estimates by industry pundits, and probably will make Electronic Arts’ bid to purchase Take Two a whole lot more expensive. The significance of the sales extends beyond buoying Take-Two, a company that has had its share of legal, financial and management struggles in the last few years. The company is the subject of a $2 billion hostile takeover