The Guardian (via Graphic News) has put out some fantastic infographics posters, so we can't say they are all bad. This is a big collection created in anticipation of the London Olympics. Here's one illustrating the 10,000m race: (link)
It's nice that they give an overview of the race, plus the calendar. The evolution of men and women times is shown on the same scale. In order to stress the improvement over time, they omitted those years in which the times did not improve (I think, although there are some mysterious omissions of data labels).
They have charts for all the different events and also in water sports, gymnastics, etc.
PS. I do not know why the women's times were omitted from some of the charts (100m, 200m etc.) In those charts, the lines for men are better colored blue to align with the dots on the calendar.