Are there any women poised to break onto this list after Athens? Possibly Deena Drossin Kastor, the American record-holder in both the 10K (30:52.32 in 2002) and marathon. At the Olympic trials, she won by a huge margin in one of the fastest 10K times in the world this year. But she's forgoing the 10K in Athens for the marathon. Her American record of 2:21:16 last year in London, combined with her track speed, puts her in a position to medal -- and possibly win gold.