From USA Today SAN FRANCISCO — Zynga CEO Mark Pincus may have an ace up his sleeve after all to save the troubled social games company he founded. UltimatePoker.com on Tuesday delivered Nevada residents a first taste of real-money Internet gambling, a move that could soon be dealt up by Zynga — not to mention others in high-tech, such as payment-processors like PayPal. “It’s a significant opportunity for Zynga,” IDC analyst Lewis Ward says of the company’s online gambling prospects. Billions of dollars could be in the offing after Ultimate Gaming, a Las Vegas-based casino operation, launches the first fully…