Here's an excerpt from the AP story:

WASHINGTON – No matter what you call it, leading experts say the virus that is scaring the world is pretty much all pig. So while the U.S. government and now the World Health Organization are taking the swine out of “swine flu,” the experts who track the genetic heritage of the virus say this: If it is genetically mostly porcine and its parents are pig viruses, it smells like swine flu to them.

Six of the eight genetic segments of this virus strain are purely swine flu and the other two segments are bird and human, but have lived in swine for the past decade, says Dr. Raul Rabadan, a professor of computational biology at Columbia University.

A preliminary analysis shows that the closest genetic parents are swine flu strains from North America and Eurasia, Rabadan wrote in a scientific posting in a European surveillance network.

“Scientifically this is a swine virus,” said top virologist Dr. Richard Webby, a researcher at St. Jude Children's Research Hospital in Memphis. Webby is director of the WHO Collaborating Center for Studies on the Ecology of Influenza Viruses in Lower Animals and Birds. He documented the spread a decade ago of one of the parent viruses of this strain in scientific papers.

“It's clearly swine,” said Henry Niman, president of Recombinomics, a Pittsburgh company that tracks how viruses evolve. “It's a flu virus from a swine, there's no other name to call it.”

Dr. Edwin D. Kilbourne, the father of the 1976 swine flu vaccine and a retired professor at New York Medical College in Valhalla, called the idea of changing the name an “absurd position.”