After reading a lot of information about sports photography issues, I have just bought a Cannon 30D and a Cannon 70-200 f2.8 USM lens primarliy to shoot pictures of my daughter's gymnastic meets. After my daughter's first meet, I found that I missed the focus on many shots. If I was in focus, the shots were very clean. However, I noticed that even in 5 fps burst mode, I would have some pictures that were focused on her and some that were focused on the nearest object or wall behind her. The problem seemed to get a little better if I had zoomed in tight on her. However, I don't want to have only closeup shots of her performance to be in focus. Any suggestions?