A few generations ago, it was Billie Jean King. Back in the 90s, Mia Hamm. Today, the women's sports pantheon is huge - from golfer Michelle Wie to heavyweight Vonda Ward. Wednesday morning on The Sound of Ideas, we'll continue our conversation about women in sport by talking to and about some of those who have reached the top. Also, we'll try to understand why apart from tennis, gymnastics and figure skating, some women's sports just can't seem to find a fan base.