If you haven't yet been on to Richard Winger's Ballot Access News (on the Hankster sidebar), please take a look. He's on top of it!!!
...The only woman presidential candidate who ever received as much as one-fifth of 1% of the total vote cast was Lenora Fulani in 1988. She was on the ballot in all 50 states and received .23%. She is also the only presidential candidate who ever received that many votes who was not a caucasian. (Ballot Access News)