Slate Magazine makes the argument to that Obama's fightthesmears.org website may be a bad idea, as even refuted rumors often repeated have a tendency to become truth with low information voters (who are also the most likely to be forwarding email rumors to begin with).
What they recommend instead is that Obama capitalize on the willing ignorance of the electorate with a "counter-rumor" strategy. A few of their suggestions:
A tape exists of Michelle Obama saying the PLEDGE OF ALLEGIANCE at a conference on PATRIOTISM.
Every weekend, Barack and Michelle take their daughters HUNTING.
Barack Obama is a PATRIOTIC AMERICAN. He has one HAND over his HEART at all times. He occasionally switches when one arm gets tired, which is almost never because he is STRONG.
Barack Obama has the DECLARATION OF INDEPENDENCE tattooed on his stomach. It's upside-down, so he can read it while doing sit-ups.
There's only one artist on Barack Obama's iPod: FRANCIS SCOTT KEY.
Barack Obama is a DEVOUT CHRISTIAN. His favorite book is the BIBLE, which he has memorized. His name means HE WHO LOVES JESUS in the ancient language of Aramaic. He is PROUD that Jesus was an American.
Barack Obama goes to church every morning. He goes to church every afternoon. He goes to church every evening. He is IN CHURCH RIGHT NOW.
Barack Obama's new airplane includes a conference room, a kitchen, and a MEGACHURCH.
Barack Obama's skin is the color of AMERICAN SOIL.
Barack Obama buys AMERICAN STUFF. He owns a FORD, a BASEBALL TEAM, and a COMPUTER HE BUILT HIMSELF FROM AMERICAN PARTS. He travels mostly by FORKLIFT.