Financial services are buzzing this morning with the red-hot debut of VeraSun’s IPO. In the most recent Bloomberg report, the story is that shares of VeraSun Energy Corp., the second-largest U.S. ethanol producer, jumped as much as 34 percent on the first day after an initial public offering that tapped rising interest in alternatives to $3-a-gallon gasoline. The shares rose as high as $30.75 after the company and stockholders yesterday sold 18.25 million at $23 each to raise $419.8 million.