At about 23-25 seconds into this video http://www.shoryuken.com/content.php the guy does ex cannon dives or whatever its called without jumping much off the ground. How do I do that? The video is somewhere down the page its a combo video with cammy practcing on Seth. Its called SF4 combo challenge 06: 700 class.
There are several threads about the dive kick. Its called a TKCS (Tiger Knee Cannon Strike). Do a search through the Cammy forum and you will find what you need.