Jesus, the guy wasn't even an announced candidate when it started:
A typical example from a currently-circulating email that started last year sometime:
Barack Hussein Obama was born in Honolulu, Hawaii, to Barack Hussein Obama Sr. (black muslim) of Nyangoma-Kogelo, Siaya District, Kenya, and Ann Dunham of Wichita, Kansas. (white atheist).And it's only going to get worse. Now that he's officially in the running, wait for the wingnuttery to pull all the stops. I'll bet you will never hear once on rightwing radio his name mentioned without that unfortunate middle name being included.
When Obama was two years old, his parents divorced and his father returned to Kenya. His mother married Lolo Soetoro -- a Muslim -- moving to Jakarta with Obama when he was six years old. Within six months he had learned to speak the Indonesian language. Obama spent "two years in a Muslim school, then two more in a Catholic school" in Jakarta. Obama takes great care to conceal the fact that he is a Muslim while admitting that he was once a Muslim, mitigating that damning information by saying that, for two years, he also attended a Catholic school.
Oh, and about those smear emails? As always, you can learn the truth at the About.com Urban Legends website or you can check it out at Snopes.com.
Not that reality will make a difference to the Moron-Americans who buy into this bullshit, but at least you will know the truth.