Motocross in MA -- A few shots

New poster here, giving a link to my album of Motocross shots. It was my first time shooting MX, second time using a Canon EOS Digital Rebel (300D) Digital SLR camera. Zoom/telephoto lens, and apertures ranging from around 1/500ths to 1/1000ths, morning to late afternoon. These pictures are from the beginning of October in Middleboro, Massachusetts. Constructive criticism greatly appreciated as well as any other comments, good, bad or ugly. Some samples of the album are below, followed by a link to the rest of the album.